Grade 6 Science Power Energy Question Preview (ID: 51232)
Power Energy.
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Power = work done/ Time taken. Power is:
a) Work done in a certain time.
b) A natural phenomenon by which the earth attracts free bodies.
c) A force of gravity exerted by the earth on a body.
d) None of the choices.
Work= Force x Distance. Work is:
a) A force of gravity exerted by the earth on a body.
b) A natural phenomenon by which the earth attracts free bodies.
c) The product of the force and covered distance.
d) None of the choices.
The relation between work done, power and time is:
a) P = W × t.
b) P = W / t.
c) P = W – t.
d) W = P / t.
The SI unit of power is:
a) Watt
b) Joules
c) Newton
d) Kilogram
The SI unit of the work done is:
a) Watt
b) Joules
c) Newton
d) Kilogram
The work done by an object of weight is 50 N in 10 m:
a) 500 J
b) 50 Kg.
c) 2 N.
d) 2 Kg.
The work done by a man in 20 seconds is 2000 J. His power is:
a) 40000 J.
b) 40000 N.
c) 100 W
d) 200 N.
The SI unit of time is:
a) Second
b) Minute
c) Hour
d) Day
A force of magnitude F does a work of 200 J along 2 m, then F equals to:
a) 100 Kg.
b) 100 N.
c) 400 Kg.
d) 400 N.
A 500 watt device works for 1 minutes. The work it does is:
a) 500 J.
b) 600 J.
c) 5000 J.
d) 30000J.
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