Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
Given mass = 5kg, height = 10m, time = 10s
Power = `"mgh"/"t" = (5 xx 10 xx 10)/10` 50 watt
APPEARS IN
संबंधित प्रश्न
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Work done by a boy depends on the time in which he does work.
Power spent by a body depends on the time for which it does work.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
Explain degradation of energy by taking two examples of your daily life.
What is meant by a translational motion? Give one example.
State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.
A water pump raises 50 kg of water through a height of 25 m in 5s. Calculate the power supplied by the pump (Take: g = 10 N kg−1).
Who is the odd one out?
