Applications of projectile motion - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1978

An air force jet flying with a speed of 335ms-1 went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?

A. 838m
B. 3350m
C. 670m
D. 1675m
E. 67m

Question 3:

• JAMB 1978

A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms^-1. The recoil speed of the machine gun is

A. 0.5 msec^-1
B. 1.5 msec^-1
C. 1 msec^-1
D. 2 msec^-1
E. 4 msec^-1

Question 4:

• JAMB 1982

A rocket burns 0.01kg of fuel each second and ejects it as a gas with a velocity of 5,000m/s. What force does the gas exert on the rocket?

A. 500,000N
B. 500N
C. 50N
D. 5,000N
E. 50,000N

Question 5:

• JAMB 1984

A gun of mass 2.0kg fires a bullet of mass 16 x 10 ^-2kg due East. If the bullet leaves the nozzle of the gun with a velocity of 150ms^-1, what is the recoil velocity of the gun?

A. 150ms^-1 due West
B. 1.2 x 10^-4ms^-1 due West
C. 1.2ms^-1 due West
D. 1.2ms^-1 due East
E. 150ms^-1 due East