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Chapter 4 - Work and Energy - 1
1.
The work done by a force of 10N applied parallel to direction of motion up to 20 m is:-
a) 10J
b) none
c) 20J
d) 200J
2.
The SI unit of power is:-
a) Joule
b) Watt
c) Calorie
d) KWH
3.
The work done is said to be negative when force and displacement are:-
a) None
b) perpendicular
c) Antiparellel
d) Parallel
4.
The dimension of power is:-
a) ML / T
2
b) ML / T
c) ML
2
/ T
d) ML
2
/ T
3
5.
One Kilowatt hour of work is always equal to:-
a) 360MJ
b) 3.6MJ
c) .36MJ
d) 36.0MJ
6.
The energy stored in the spring of a watch is:-
a) Electrical Energy
b) Elastic P.E
c) K.E
d) Solar Energy
7.
Work-Energy equation can be expressed as:-
a) F.V = K.E
f
2
- K.E
i
2
b) ma = K.E
f
2
- K.E
i
2
c) Fa = K.E
f
2
- K.E
i
2
d) Fd = K.E
f
- K.E
i
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