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

Question 11:

• JAMB 1984

What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh?

A. N0.65
B. N0.13
C. N3.90
D. N39.00
E. N234.00

Question 12:

• JAMB 1984

A force varying linearly with the distance acts on a body as shown above, The work done on the body by the force during the first 10m of motion is

A. 100J
B. 150J
C. 200J
D. 300J
E. 600J

Question 13:

• JAMB 1985

In the Fig above, Current I passes through the combination, if the power dissipated in the 5 ohm resistor is 40W, then the power dissipated in the 10 ohm resistor is

A. 10W
B. 20W
C. 40W
D. 80
E. 100W

Question 14:

• JAMB 1986

Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same

A. Momentum
B. Kinetic energy
C. Potential energy
D. Acceleration

Question 15:

• JAMB 1987

A constant force of 40N acting on a body initially at rest gives an acceleration of 0.1ms^-2 for 4s. Calculate the work done by the force

A. 8J
B. 10J
C. 32J
D. 160J