Practice Questions: Momentum and Impulse
Subject: Physics | Grade: 11 | Topic: Momentum and Impulse
Practice Questions: Momentum and Impulse
Two bumper cars collide. After collision, they move separately, but the total kinetic energy decreases.
1.1 Is momentum conserved?
1.2 Is kinetic energy conserved?
1.3 State the type of collision.
Two balls collide and move separately after collision. The total kinetic energy before collision is greater than the total kinetic energy after collision.
2.1 Is momentum conserved?
2.2 Is kinetic energy conserved?
2.3 State the type of collision.
A driver in a car is brought to rest during a collision. An airbag increases the time taken for the driver to stop.
3.1 Explain why the airbag reduces injury.
3.2 Which physical quantity is reduced when stopping time increases?
A safety mat increases the time taken for a gymnast to stop after landing.
4.1 Explain why the safety mat reduces injury.
4.2 Which physical quantity decreases when stopping time increases?
A 4 000 kg delivery van moves right at 12 m·s-1. A 1 500 kg car moves left at 8 m·s-1. After collision, the car moves right at 2 m·s-1.
5.1 Calculate the velocity of the van after collision.
5.2 Calculate the change in kinetic energy of the system.
5.3 State whether the collision is elastic or inelastic.
A 5 000 kg truck moves right at 10 m·s-1. A 2 000 kg car moves left at 6 m·s-1. After collision, the car moves right at 1 m·s-1.
6.1 Calculate the velocity of the truck after collision.
6.2 Calculate the change in kinetic energy of the system.
6.3 State whether the collision is elastic or inelastic.
A 0.2 kg ball moving right at 30 m·s-1 is hit back to the left at 20 m·s-1. Contact time is 0.05 s.
7.1 Calculate the change in momentum.
7.2 Calculate the average force.
A 0.15 kg ball moving right at 40 m·s-1 is hit back to the left at 10 m·s-1. Contact time is 0.03 s.
8.1 Calculate the change in momentum.
8.2 Calculate the average force.
A 50 kg skater moves east at 6 m·s-1. A 40 kg skater moves west at 3 m·s-1. They hold onto each other after collision.
9.1 Calculate their velocity after collision.
9.2 Calculate the distance travelled in 5 s after the collision.
A 60 kg skater moves east at 5 m·s-1. A 40 kg skater moves west at 2 m·s-1. They hold onto each other after collision.
10.1 Calculate their velocity after collision.
10.2 Calculate the distance travelled in 5 s after the collision.
An object's momentum changes from 60 kg·m·s-1 to -90 kg·m·s-1 in 5 s.
11.1 Define momentum.
11.2 Calculate the impulse.
11.3 Calculate the average net force.
An object's momentum changes from 80 kg·m·s-1 to -40 kg·m·s-1 in 4 s.
12.1 Define momentum.
12.2 Calculate the impulse.
12.3 Calculate the average net force.
A 1 000 kg car moves left at 15 m·s-1 and rebounds right at 5 m·s-1. The collision lasts 0.2 s.
13.1 Calculate the impulse experienced by the car.
13.2 Calculate the average force exerted on the car.
A 1 200 kg car moves left at 12 m·s-1 and rebounds right at 3 m·s-1. The collision lasts 0.3 s.
14.1 Calculate the impulse experienced by the car.
14.2 Calculate the average force exerted on the car.