Advertisements
Advertisements
Question
Advertisements
Solution
SI unit of power = watt
CGS unit of power = erg per second
1` W = 1 J s -1 = 107 erg s -1
APPEARS IN
RELATED QUESTIONS
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
No work is done by a force if the body
When does a force perform work?
What are the two kinds of mechanical energy?
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
List any six forms of energy and write a short note on each of them.
A is a push or a pull ______.
