Miss Liyana_QUIZ 3(PART 1) SP015 SEM 1, SESI 2023/2024

1. Momentum is defined as the product of mass, m and

• A. Impulse, J
• B. Acceleration, a
• C. Velocity, v
• D. Distance, s

2. The impulse-momentum theorem states that

• A. The force on a moving object is equal to the magnitude of the impulse
• B. The impulse on an object is equal to the change in momentum, p of the body
• C. The impulse on an object is greater than the change in momentum it causes
• D. The impulse on an object is less than the change in momentum it causes

3. Which of the following statements describing elastic collision between two objects is correct?

• A. The momentum and total energy are conserved but the kinetic energy can be changed to other forms of energy.
• B. The kinetic energy and total energy of both objects are conserved but the momentum is conserved only if the objects have the same mass.
• C. Kinetic energy is conserved; the total momentum may decrease but cannot increase.
• D. Momentum, kinetic energy and the total energy are all conserved.

4. The graph shows how the force F on a body in a collision with another body varies with time t. The area under the graph represents

• A. the acceleration
• B. the work done
• С. the change in momentum
• D. the velocity

5. The direction of momentum is _________ as the direction of velocity

• Same
• Opposite

6. Impulse is a _________ quantity

• Scalar
• Vector

7. Direction of impulse is _______ as the direction of force

• Same
• Opposite

8. The law of conservation of momentum states that

• In a closed system, the total momentum before is more than the total momentum after
• In a closed system, the total momentum before is less than the total momentum after
• In a closed system, the total momentum after is more than the total momentum before
• In a closed system, the total momentum before is equal to the total momentum after

9. When the speed of an object is doubled, its momentum

• A. remains unchanged in accord with the conservation of momentum.
• B. doubles
• C. quadruples
• D. decreases

10. When the mass of an object is reduced by half, its momentum

• A. remains unchanged in accord with the conservation of momentum.
• B. doubles
• C. quadruples
• D. decreases by half