Motion in straight line questions | form two Physics

The similarity between velocity and speed lies in their:
A. Units being the same
B. Direction of travel
C. Magnitudes being the same
D. Covered distance being in the same direction

The area under a velocity-time graph represents

1. distance
2. speed
3. acceleration
4. deceleration

The product of mass and velocity of a body is called _____________.

The acceleration of a body of mass 30 kg when a constant force of 150 N is applied on it, will be:
A. 0.05 m/s2
B. 0.5 m/s2
C. 5.0 m/s2
D. 50 m/s2

The area under the curve of a velocity time graph represents:
A. acceleration
B. distance covered
C. speed
D. velocity.

Define the term velocity

An object travelling at 8 m/s accelerates at 2 m/s² for 6 seconds. Calculate its final velocity.

An object starts from rest and moves with a velocity of 20 m/s for ? seconds. It maintains this speed for 20 seconds before applying brakes and comes to rest after 10 seconds.

(a) Sketch the velocity-time graph for this motion.
(b) From the graph drawn in part (a) above, find:
(i) Acceleration
(ii) Deceleration
(c) Calculate the total distance covered for the whole motion.

(i) State the law of conservation of linear momentum.
(ii) Define the term “elastic collision”.

A body of mass 8 kg moving with a velocity of 20 m/s collides with another body of mass 4 kg moving with a velocity of 10 m/s in the same direction. The velocity of the 8 kg body is reduced to 15 m/s after the collision. If the bodies do not stick together after the collision, calculate the final velocity of the 4 kg body.