**Collision Quiz and Answers **are must for the aspirants who are preparing for various competitive examination. It covers the concept of Work, Energy and Power which is very important for any competitive exams. This Law of Work, Energy and Power topic is given most importance in various competitive exams like JEE Main, JEE Advanced, NEET, AIIMS etc.

## Collision Quiz and Answers

**1. For what value of e is a collision partially elastic?**

a) 0 < e < 1

b) 1

c) e > 1

d) 0

**Answer: **a

**2. A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the magnitude of the final momentum of the system in Kg-m/s?**

a) 1700

b) 1500

c) 1300

d) 1100

**Answer: **d

**3. A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the final velocity of the cube in m/s?**

a) 7

b) 5

c) 3

d) 11

**Answer: **a

**4. A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the final velocity of the ball in m/s?**

a) 7

b) 5

c) 31/3

d) 11/3

**Answer: **c

**5. A car of mass 1ton is moving with a velocity of 25 m/s towards left. A truck of mass 5 ton is moving towards left with a velocity of 3 m/s. If the collision is perfectly elastic, what is the final velocity of the truck in m/s?**

a) 11

b) 25

c) 3

d) 10

**Answer: **c

**6. When two same masses travelling in opposite directions with different velocities collide perfectly elastically, their velocities ______**

a) Exchange

b) Remain unchanged

c) Increase

d) Decrease

**Answer: **a

**7. A ball traveling with some velocity v hits another ball elastically which is stationary. What will happen to the system?**

a) The stationary ball will start moving with a velocity v and the moving ball will come at rest

b) The stationary ball remains at rest and the moving ball starts moving in opposite direction

c) Both the balls become stationary

d) Both the balls start moving

**Answer: **a

**8. When e < 1, the kinetic energy in the collision is ____**

a) Lost

b) Gained

c) Gained exponentially

d) Unchanged

**Answer: **a

**9. Two bodies collide perfectly inelastically, they will ______**

a) Move together

b) Move in opposite directions

c) Move separately

d) Remain stationary

**Answer: **a

**10. What is the coefficient of restitution (e)?**

a) Ratio of final to initial relative velocities

b) Ratio of initial to final relative velocities

c) Ratio of final to initial velocity of a body

d) Product of initial to final relative velocities

**Answer: **a

**11. For what value of e is a collision perfectly elastic?**

a) 1

b) 2

c) 0.5

d) 0

**Answer: **a

**12. For what value of e is a collision perfectly inelastic?**

a) 1

b) 2

c) 0.5

d) 0

**Answer: **d