(a) Work, Energy and Power - Jamb Physics Past Questions and Answers

Question 61:

• JAMB 2017

A man of mass 50kg ascends a flight of stains 5m high in 5 seconds. If acceleration due to gravity is 10ms\(^{-2}\) the power expended is

A. 100w
B. 200w
C. 400w
D. 500w

Question 62:

• JAMB 2018

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

A. Heat ----> Light----> Sound ----> Kinetic
B. Kinetic ----> Light ----> Heat ----> Electricity
C. Heat ----> Kinetic ----> Electricity ----> Heat and Light
D. Electricity ----> Kinetic ----> Heat ----> Light

Question 63:

• JAMB 2018

A lead bullet of mass 0.05 kg is fired with a velocity of 200 m/s into a lead block of mass 0.95 kg. Given that the lead block can move freely, the final kinetic energy after impact is

A. 100J
B. 150J
C. 50J
D. 200J

Question 64:

• JAMB 2018

The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.

A. 0.3Ω
B. 3.3Ω
C. 3.6Ω
D. 4.8Ω

Question 65:

• JAMB 2018

The product of force and time is?

A. Impulse
B. Momentum
C. Inertia
D. Friction