Simple Machines - 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 1979

Which of the following statements defines correctly the efficiency of a machine?

A. The load carried by the machine divided by effort required in carrying the load
B. The distance moved by the load divided by the distance moved by the effort
C. The useful work done by the machine divided by the total work put into the machine
D. The movement of the load divided by the movement of the effort about the same point
E. The temperature at the end of the application of the machine divided by the initial temperature

Question 3:

• JAMB 1979

A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever balanced?

A. 50cm
B. 20cm
C. 10cm
D. 30cm
E. 70cm

Question 4:

• JAMB 1981

An inclined plane of angle \(\theta\), acting as a simple machine, has a velocity ratio

A. Sin\(\theta\)
B. \(\frac{1}{\text{sin}\theta}\)
C. Cos\(\theta\)
D. \(\frac{1}{\text{cos}\theta}\)
E. Sin\(\theta cos\theta\)

Question 5:

• JAMB 1982

Which of the following machines does NOT apply the lever principle?

A. Claw hammer
B. Wheel barrow
C. Single moving pulley
D. Sugartongs
E. Nutcrackers