Advertisements
Advertisements
प्रश्न
Fill in the boxe to show the corresponding energy transformation.
Advertisements
उत्तर
Chemical energy ⇌ Light energy
APPEARS IN
संबंधित प्रश्न
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.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
What is the SI unit of work?
Is power a scalar quantity?
Distinguish between work and power.
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A boy of mass m climbs up a staircase of vertical height h.
- What is the work done by the boy against the force of gravity?
- What would have been the work done if he uses a lift in climbing the same vertical height?
Can two agents, doing the same work, have different power?
