Motion - Jamb Physics Past Questions and Answers

Question 81:

• JAMB 1998

A bullet fired at a wooden block of thickness 0.15m manages to penetrate the block. If the mass of the bullet is 0.025kg and the average resisting force of the wood is 7.5 x 10³N, calculate the speed of the bullet just before it hits the wooden block.

A. 450ms^-1
B. 400ms^-1
C. 300ms^-1
D. 250ms^-1

Question 82:

• JAMB 1998

A ball is moving at 18ms^-1 in a direction inclined at 60^o to the horizontal. The horizontal component to its velocity is

A. 9√3ms^-1 ·
B. 6√3ms^-1 ·
C. 8√3ms^-1 ·
D. 9ms^-1 ·

Question 83:

• JAMB 1998

In free fall, a body of mass 1kg drops from a height of 125m from rest in 5s. How long will it take another body of mass 2kg to fall from rest from the same height? [g = 10ms^-1·]

A. 5s
B. 10s
C. 12s
D. 15s

Question 84:

• JAMB 1998

A ball of mass 0.15kg is kicked against a rigid vertical wall with a horizontal velocity of 50ms^-1. If it rebounced with a horizontal velocity of 30ms^-1, Calculate the impulse of the ball on the ball · ·

A. 3.0Ns
B. 4.5Ns
C. 7.5Ns
D. 12.0Ns

Question 85:

• JAMB 1998

The force of attraction between two point masses is 10^-4N when the distance between them is 0.18m. If the distance is reduced to 0.06m, calculate the force.

A. 1.1 x 10^-5N
B. 3.3 x 10^-5N
C. 3.0 x 10^-4N
D. 9.0 x 10^-4N