Physics Past Questions

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1121

What happens when three coplanar non-parallel forces are in equilibrium?

A. Their lines of action are parallel.
B. They are represented in magnitude only
C. They are represented in direction only
D. Their lines of action meet at a point

View Answer & Discuss JAMB 2014

1122

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

View Answer & Discuss (11) JAMB 2014

1123

The energy in the nucleus of atoms produce heat which can be used to generate

A. Kinetic energy
B. Mechanical energy
C. Electrical energy
D. Potential energy

View Answer & Discuss (24) JAMB 2014

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1124

A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4.

A. 343.32N
B. 233.33N
C. 333.33N
D. 334.33N

View Answer & Discuss (3) JAMB 2014

1125

A wheel and an axle is used to raise a load whose weight is 800N when an effort of 250N is applied. If the radii of the wheel and axle are 800mm and 200mm respectively, the efficiency of the machine is

A. 90%
B. 80%
C. 85%
D. 87%

View Answer & Discuss (4) JAMB 2014

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