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Chapter 4 - Work and Energy - 6
1.
The work is product of force and velocity.
a) True
b) False
2.
Work is the dot product of force and displacement.
a) False
b) True
3.
Work is said to be zero when angle between F and d is 90
o
.
a) False
b) True
4.
Work done in gravitational force along a closed path is always zero.
a) True
b) False
5.
Work done in a gravitational field is dependent of the path followed by the body.
a) False
b) True
6.
Work done by the centripetal force is always zero.
a) False
b) True
7.
Gravitational field is a non-conservative field.
a) True
b) False
8.
The rate at which work is done is called power.
a) True
b) False
9.
Commercial unit of power is watt.
a) True
b) False
10.
Absolute P.E of a body is GM/ R
2
a) True
b) False
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