Work, Energy and Power - Jamb Physics Past Questions and Answers

Question 31:

• JAMB 2013

An object is moving with a velocity of 5m^-1. At what height must a similar body be situated to have a potential energy equal in value with kinetic energy of the moving body?

A. 25.0m
B. 20.0m
C. 1.3m
D. 1.0m

Question 32:

• JAMB 2013

If a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump is

A. 2.2.5 x 10 ⁵js^-1
B. 2.5 x 10⁴js^-1
C. 3.3 x 10³js^-1
D. 3.3 x 10²js^-1

Question 33:

• JAMB 2013

A gas at a pressure of 10⁵Nm^-2expands from 0.6m^-3 to 1.2m³ at constant temperature, the work done is

A. 7.0 x 10⁶J
B. 6.0 x 10 ⁶J
C. 6.0 x 10 ⁵J
D. 6.0 x 10 ⁴J

Question 34:

• JAMB 2014

An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is

A. 200J
B. 4000J
C. 2000J
D. 500J

Question 35:

• JAMB 2015

If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?

A. Mechanical energy
B. Stationary energy
C. Potential energy
D. Vibrational energy