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

Question 56:

• JAMB 2015

Which of the following option is right if an object fall freely to the ground?
1. The total energy is Kinetic
2. The ratio of potential energy to kinetic energy is constant
3. The sum of potential and kinetic is constant

A. 1 only
B. 2 only
C. 3 only
D. 1 and 2 only

Question 57:

• JAMB 2015

Momentum and Kinetic energy are conserved in

A. Inelastic collision
B. Elastic collision
C. Explosion
D. Spacecraft

Question 58:

• JAMB 2016

I.Chemical II.Sound III.Electricity
Which of the above forms of energy can directly be converted to light energy?

A. I and II only
B. II and III only
C. I, II and III
D. I and III only

Question 59:

• JAMB 2016

A dynamo primarily converts

A. Mechanical energy into electrical energy
B. Electrical energy into kinetic energy
C. Potential energy into kinetic energy
D. Kinetic energy into potential energy

Question 60:

• JAMB 2017

Under which of the following conditions is workdone

A. A man supports a heavy food above his head with his hands
B. A boy climbs onto a table
C. A man pushes unto a table
D. A woman holds a pot of water