Advertisements
Advertisements
प्रश्न
What is meant by power?
एका वाक्यात उत्तर
Advertisements
उत्तर
The rate of doing work is called power.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
When is work said to be done by a force?
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
What is the condition for a force to do work on a body?
The work done on an object does not depend on ______.
Complete the following sentences:
The SI unit of work is ....... and of power is .......
What is the relation between 1 H.P. and 1 kW?
Can a body possess zero kinetic energy?
A horse exerts a pull on a cart of 300 N so that the horse-cart system moves with a uniform speed 18 km/h on a level road. Calculate the power developed by the horse in watt and also find its equivalent in horse power.
How long should an electric motor, of power 2 H.P. operate, so as to pump 5 m3 of water from a depth of 15m. [Take g = 10 N kg−1]
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
