CBSE Class 8 Science Chapter 8 Force And Pressure MCQs

CBSE Class 8 Science Chapter 8 Force And Pressure Multiple Choice Questions

Question 1. In the figure, two boys, A and B, are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

1. The magnitude of force applied by A is greater than that of B.
2. The magnitude of the force applied by A is smaller than that of B.
3. Net force on the block is towards A.
4. The magnitude of force applied by A is equal to that of B

Answer: 1. The Magnitude of force applied by A is greater than that of B.

Question 2. In the circuit shown in the figure, when the circuit is completed, the hammer strikes the gong. Which of the following forces is responsible for the movement of a hammer?

1. Gravitational force alone
2. Electrostatic force alone
3. Magnetic force alone
4. Frictional force alone

Answer: 3. Magnetic force alone

Question 3.

A brick is kept in three different ways on a table, as shown in the figure. The pressure exerted by the brick on the table will be

1. Maximum in position a
2. Maximum in position c
3. Maximum in position b
4. Equal in all cases

Answer: 1. Maximum in position a

Question 4. The figure shows a container filled with water. Which of the following statements is correct about the pressure of water?

1. Pressure at A > Pressure at B > Pressure at C
2. Pressure at A = Pressure at B = Pressure at C
3. Pressure at A < Pressure at B > Pressure at C
4. Pressure at A < Pressure at B < Pressure at C

Answer: 4. Pressure at A < Pressure at B < Pressure at C

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Question 5.

A water tank has four taps fixed at points A, B, C, and D as shown in the figure. The water will flow out at the same pressure from taps at

1. B and C
2. C and D
3. A and B
4. A and C

Answer: 1. B and C

Question 6. P, Q, and Rand S are four solid objects having the same mass. Which object is exerting the least pressure on the table?

1. P
2. Q
3. R
4. S

Answer: 2. Q

Question 7. Type of force where only attraction is found

1. Electrostatic force
2. Magnetic force
3. Gravitational force
4. Both (a) and (b)

Answer: 3. Gravitational force

Question 8. The wear and tear in the machine part is due to

1. Electrostatic force
2. Muscular force
3. Frictional force
4. Gravitational force

Answer: 3. Frictional force

Question 9. Like poles exert a force of

1. Attraction
2. Repulsion
3. Both 1 and 2
4. None of these

Answer: 4. None of these

Question 10. A block of mass 2 kg tied with a rope is going down under the force of gravity of 20 N.

How much force is required by the hand to stop the motion of the block?

1. 10 N
2. 20 N
3. 30 N
4. 40 N

Answer: 2. 20 N

Question 11. When a stone is rotated on a circular path uniformly, the effect of the force will be

1. Change in direction and magnitude of motion.
2. Change in shape of an object.
3. Change in direction of motion only.
4. Change in magnitude only.

Answer: 3. Change in direction of motion only.