Worksheet – Momentum Class- VIII

Q1. The diagram shows a roller-coaster ride.
The car is pulled slowly from the start to point B and then released.

The mass of the car is 900 kg. The maximum speed of the car is 15 m/s.
(i) State the relationship between momentum, mass and velocity.

(ii) Calculate the maximum momentum of the car. Give the unit.
maximum momentum = unit

Q2. A car travels at 15 m/s. The momentum of the car is 21000 kg m/s.

Calculate the mass of the car.

mass = kg

Q3. A truck of mass 9000 kg is moving at a velocity of 4.5 m/s.
A car of mass 1500 kg has the same momentum as the truck.

Calculate the velocity of the car.

velocity = m/s
Q4. A railway truck of mass 7000 kg rolls into a stationary truck of mass 5000 kg at a velocity of 8 m/s. After the collision, they move off together.
What is the velocity of the two trucks after the collision?

Q5. An air rifle pellet of mass 0.002 kg is fired into clay mounted on a model railway truck. The mass of the truck and clay is 0.1 kg. After hitting, the truck moves off with a velocity of 0.8 m/s.
Calculate the momentum of the clay and truck just after the collision.

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