Worksheet: Real-Life Applications of Newton’s Laws, Impulse & Momentum
Level: CBSE / NEET / JEE Main
Questions: 20 MCQs
Instructions: Choose the single correct answer.
1. Inertia of Rest
A passenger standing in a bus tends to fall backward when the bus suddenly starts moving forward. This is because of:
A) Inertia of motion
B) Inertia of rest
C) Conservation of momentum
D) Newton's third law
2. Inertia of Motion
When a moving bus suddenly stops, passengers tend to move forward. The main reason is:
A) Inertia of rest
B) Friction
C) Inertia of motion
D) Gravitational force
3. Dusting a Carpet
When a carpet is beaten with a stick, dust particles come out because:
A) Dust has greater density than the carpet
B) Dust particles tend to remain at rest due to inertia
C) Dust particles are attracted by Earth
D) The carpet exerts no force on dust
4. Newton's Second Law
A force of 20N acts on a 5kg object initially at rest. Its acceleration is:
A) 2m/s2
B) 4m/s2
C) 5m/s2
D) 100m/s2
5. Shopping Cart
It is easier to accelerate an empty shopping cart than a fully loaded one using the same force because:
A) The loaded cart has greater inertia
B) The loaded cart has greater velocity
C) The empty cart has greater momentum
D) The empty cart experiences greater friction
6. Catching a Cricket Ball
A cricket player moves his hands backward while catching a fast ball. This is done to:
A) Increase the change in momentum
B) Increase the force on the hands
C) Increase the time of collision and reduce the force
D) Increase the momentum of the ball
7. Airbags
Airbags in cars reduce injuries during collisions mainly because they:
A) Increase the momentum of passengers
B) Increase the time over which momentum changes
C) Increase the acceleration of passengers
D) Stop passengers instantaneously
8. Cushioning Effect
A person jumping from a height bends their knees on landing. The purpose is to:
A) Increase the stopping time and reduce the impact force
B) Reduce the stopping time
C) Increase the change in momentum
D) Increase the final velocity
9. Impulse
A force of 50 N acts on a body for 0.2 s. The impulse delivered is: (in N.s)
A) 5
B) 10
C) 25
D) 250
10. Change in Momentum
A 2 kg ball moving at 5 m/s is brought to rest. The magnitude of its change in momentum is: (in kg. m/s)
A) 2
B) 5
C) 10
D) 20
11. Cricket Bat
A cricket ball of mass 0.15 kg moving at 20 m/s is hit back with a velocity of 30 m/s in the opposite direction. The magnitude of change in momentum is: (in kg. m/s)
A) 1.5
B) 3.0
C) 4.5
D) 7.5
12. Newton's Third Law in Walking
A person is able to walk forward because:
A) The person pushes the ground backward and the ground pushes the person forward
B) The person pushes the ground forward and the ground pushes the person backward
C) Gravity pushes the person forward
D) The person's inertia pushes them forward
13. Rocket Propulsion
A rocket moves upward because:
A) Gases push the rocket upward directly
B) The rocket pushes gases downward and gases exert an equal opposite force on the rocket
C) Gravity becomes zero
D) The rocket has no inertia
14. Recoil of a Gun
When a bullet is fired from a gun, the gun recoils backward because:
A) Total momentum of the gun-bullet system is conserved
B) The gun has greater kinetic energy than the bullet
C) Newton's first law is violated
D) Gravity causes recoil
15. Collision
A 2 kg object moving at 6 m/s collides with a stationary 4 kg object. If they stick together, their common velocity is:
A) 1 m/s
B) 2 m/s
C) 3 m/s
D) 6 m/s
16. Egg Dropping on a Cushion
An egg is less likely to break when dropped on a thick cushion rather than a hard floor because the cushion:
A) Reduces the change in momentum
B) Increases the time of impact and reduces the average force
C) Increases the momentum of the egg
D) Makes the egg weightless
17. Hammer and Nail
A nail is driven into wood by hitting it with a hammer. The large force produced during impact is mainly associated with:
A) Very small change in momentum
B) Large change in momentum occurring in a short time
C) Zero impulse
D) Zero acceleration
18. Seat Belts
Seat belts protect passengers during sudden braking because they:
A) Increase the passenger's velocity
B) Prevent the passenger from continuing forward due to inertia
C) Increase the passenger's momentum
D) Eliminate inertia
19. Catching a Heavy Object
Suppose two people catch identical objects moving with the same velocity. Person A stops the object in 0.1 s, while Person B stops it in 0.5 s. The force exerted by:
A) A is greater than B
B) B is greater than A
C) Both are equal
D) Cannot be determined
20. Real-Life Application of Newton's Second Law
A truck and a car experience the same net force. Which statement is correct?
A) Both have the same acceleration
B) The truck has greater acceleration because it is heavier
C) The car has greater acceleration because it has smaller mass
D) Neither accelerates
Answer Key
| Q | Ans | Q | Ans |
|---|---|---|---|
| 1 | B | 11 | D |
| 2 | C | 12 | A |
| 3 | B | 13 | B |
| 4 | B | 14 | A |
| 5 | A | 15 | B |
| 6 | C | 16 | B |
| 7 | B | 17 | B |
| 8 | A | 18 | B |
| 9 | B | 19 | A |
| 10 | C | 20 | C |
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