Jamb Physics 1998 Past Questions and Answers

Question 1:

• 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 2:

• 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 3:

• JAMB 1998

The velocity of a sound wave at 27^oC is 360ms^-1. Its velocity at 127^oC is

A. 120√3 ms^-1
B. 240 ms^-1
C. 240√3 ms^-1
D. 720√3 ms^-1

Question 4:

• JAMB 1998

The physical quantity that has the same dimensions as impulse is

A. Energy
B. Momentum
C. Surface tension
D. Pressure

Question 5:

• 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 ·