Force and Pressure MCQs Class 8

Correct Answer: B. Force is the scientific term for a push or a pull exerted on an object.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Thinking about a problem is a mental activity and does not involve a physical push or pull, hence it’s not a force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. A force is necessary to overcome inertia and set a stationary object in motion.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Force can cause a change in the state of motion (start/stop movement, change speed/direction) and also deform or change the shape of an object.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Kicking a football involves applying a force that can initiate motion from rest, alter the ball’s direction, and influence its speed.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Forces arise due to the interaction or interplay between at least two objects.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The force exerted by the teams in tug-of-war originates from the muscles in their bodies, making it a muscular force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. The force applied by the person pushing interacts with the car, causing it to overcome inertia and start moving.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. The net force considers both the magnitude and direction of all forces acting on an object, and it ultimately dictates how the object’s motion will be affected.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. When two equal and opposite forces act on an object, they cancel each other out, resulting in a net force of zero.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Applying forces in the same direction results in a larger net force, making it easier to move the box and causing it to accelerate faster.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Equal and opposite forces result in a net force of zero, so the box will remain stationary.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. The SI unit of force is the Newton (N), named after Sir Isaac Newton.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Force is a vector quantity, meaning it has both magnitude (strength) and direction.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. The impact of a force is influenced by its magnitude, direction, and the mass of the object it acts upon.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Applying a force to a moving ball can alter its speed, direction, or both.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. A force applied in the direction of motion adds to the object’s velocity, causing its speed to increase.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. To stop the ball, the goalkeeper applies a force opposite to the ball’s direction of motion, causing it to decelerate.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Volleyball players use force to control the ball, altering both its speed and direction to make strategic plays.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The state of motion encompasses both how fast an object is moving (speed) and where it’s going (direction).(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. An object at rest is not moving, therefore its speed is zero.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. While force can cause changes in motion or shape, it’s not always guaranteed. Sometimes the force may not be enough to overcome opposing forces or the object’s inertia.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these scenarios involve forces causing changes in the speed and/or direction of the objects, thus altering their state of motion.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Multiple factors contribute to the wall not moving, including its mass, the friction with the ground, and its attachment to the foundation.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. A force can influence an object’s state of motion by altering its speed, its direction of travel, or both.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Stretching a rubber band involves applying a force that deforms its original shape.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Squeezing a lemon primarily changes its shape, allowing the juice to be extracted.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Inflating a balloon requires force to change its shape, increase internal air pressure, and stretch the rubber.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Pushing a car primarily changes its state of motion, not its shape.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. A force has the potential to alter an object’s state of motion, its shape, or both, depending on the situation.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Muscular force is generated by the contraction and relaxation of muscles in our body, allowing us to move and interact with our surroundings.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these actions require the use of muscles to generate the necessary force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Muscles in the walls of the digestive tract contract and relax in a coordinated manner to propel food through the system.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The diaphragm and intercostal muscles between the ribs contract and relax to expand and compress the chest cavity, facilitating breathing.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Muscular force requires physical contact between the muscles and the object being acted upon.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Friction is a force that resists motion between two surfaces in contact.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Friction between the tires and the road, as well as within the bicycle’s moving parts, gradually slows it down until it stops.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Friction can be both helpful (providing traction for walking or driving) and hindering (slowing down or stopping objects).(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The type of surfaces (rough or smooth) and the force pushing them together influence the amount of friction.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Friction arises due to the interaction between surfaces in contact, making it a contact force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Magnetic force is the attraction or repulsion between magnets or between a magnet and a magnetic material.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Like poles (north-north or south-south) of magnets repel each other.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Magnets can exert force on each other or on magnetic materials without being in direct contact, making it a non-contact force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Rubbing the straw with paper creates an electrostatic charge on the straw, allowing it to attract or repel other charged or uncharged objects.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Like charges repel, and unlike charges attract.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Electrostatic force acts between charged objects even when they are not in direct contact, making it a non-contact force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Gravity is the force of attraction between any two objects with mass. The Earth’s gravity pulls objects towards its center.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Gravity is a universal force that acts between any two objects with mass, regardless of their size or distance.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The strength of the gravitational force is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between their centers.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Gravity acts between objects even when they are not touching, making it a non-contact force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Pressure is calculated by dividing the force applied by the area over which it acts.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Pressure is inversely proportional to area. So, for the same force, a smaller area results in higher pressure.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The sharp edge of a knife has a tiny area of contact, concentrating the force and creating high pressure, making it easier to cut through materials.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Broad straps increase the contact area between the bag and the shoulder, thereby decreasing the pressure and making it more comfortable to carry.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The SI unit of pressure is the Pascal (Pa), named after Blaise Pascal.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The sharp point concentrates the force on a tiny area, creating high pressure that helps penetrate the board. Pressing on the flat head reduces the pressure, making it harder to push in.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these scenarios illustrate how pressure is influenced by force and the area over which it acts.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Pressure is directly proportional to force. Increasing the force while maintaining the same area leads to higher pressure.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Pressure is inversely proportional to area. Decreasing the area while keeping the force constant results in increased pressure.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The cloth increases the area over which the load’s force is distributed, thus reducing the pressure exerted on the porter’s head, making it more comfortable to carry.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Liquids exert pressure equally in all directions due to the random movement of their molecules.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. The pressure at a point within a liquid is influenced by the liquid’s density, the height of the liquid column above that point, and the acceleration due to gravity.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Liquid pressure is uniform at any given depth, regardless of the direction.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The bulging rubber sheet demonstrates that water exerts pressure on the sides of the container as well, not just downwards.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Water streams from holes at the same height will fall at approximately the same distance, indicating equal pressure at that depth.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Similar to liquids, gases exert pressure uniformly in all directions due to the constant collisions of their molecules with the container walls.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. The air inside the balloon exerts pressure outwards, and tying the mouth prevents it from escaping, maintaining the balloon’s inflated shape.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The holes in the balloon allow the pressurized air inside to escape, causing it to deflate.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Air, like other gases, exerts pressure uniformly in all directions due to the random motion of its molecules.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Atmospheric pressure is the force exerted by the weight of the atmosphere on a unit area of the Earth’s surface.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The atmosphere is a layer of gases surrounding the Earth, and its weight creates pressure on all objects within it.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Atmospheric pressure is the result of the gravitational force acting on the air molecules in the atmosphere above a given area.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The atmospheric pressure decreases with increasing altitude because there is less air above to exert a downward force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. When you press the sucker, you force out some of the air trapped inside. This creates a lower pressure inside the cup compared to the atmospheric pressure outside, causing the sucker to stick firmly to the surface.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The fluids and gases inside our bodies exert an outward pressure that balances the atmospheric pressure, preventing us from being crushed.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Von Guericke’s experiment showed that the force of atmospheric pressure is so great that it can hold two hemispheres together even when pulled by horses.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The atmospheric pressure on our heads is significant, but we are unaware of it because the pressure inside our bodies balances it out.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. A barometer is a scientific instrument specifically designed to measure atmospheric pressure.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Atmospheric pressure decreases with altitude because there is less air above to exert downward force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The weight of the air column is substantial, creating the atmospheric pressure we experience.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Thermal force is not a recognized type of force. The other options represent different forces.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Force has the potential to influence an object’s motion (speed and direction) and its shape.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Contact forces, such as friction and muscular force, necessitate direct physical contact between the interacting objects.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Gravity acts between objects even when they are not touching, making it a non-contact force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Pressure increases with increasing force and decreases with increasing area.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Both liquids and gases exert pressure uniformly in all directions due to the random movement of their molecules.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Atmospheric pressure decreases as you go higher because there is less air above to exert downward force.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The Pascal (Pa) is the SI unit of pressure, representing one newton of force per square meter of area.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Atmospheric pressure decreases with altitude, not increases.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these examples demonstrate how force can alter an object’s speed, direction, or both, resulting in a change in its state of motion.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these actions involve applying a force that deforms or alters the original shape of the object.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: A. Muscular force is generated through physical contact between muscles and the object being acted upon.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Friction can be beneficial by providing traction, but it also opposes motion, leading to energy loss and wear and tear.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. Friction requires contact between surfaces, while the other options are forces that can act at a distance.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. The pressure within a liquid increases with depth and is influenced by both the liquid’s density and the height of the liquid column above the point of measurement.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. Atmospheric pressure is highest at sea level and decreases with increasing altitude due to the reduced weight of the air column above.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. All these examples demonstrate how the concept of pressure is applied in various real-life situations.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: C. Gravity’s attractive force is what keeps planets in their orbits around the Sun and governs the motion of celestial bodies.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: B. The sharp point of the drawing pin concentrates the force on a tiny area, creating high pressure that helps it penetrate the board easily.(Force and Pressure MCQs Class 8 – Top100MCQ.com)

Correct Answer: D. The concept of pressure is crucial in various fields, including engineering, sports safety, and footwear design, to ensure structural integrity, impact protection, and comfort.(Force and Pressure MCQs Class 8 – Top100MCQ.com)