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संबंधित प्रश्न
Define the term energy.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
What do you mean by a kilo joule?
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
Can work done be zero even if force acts on the body?
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
