Advertisements
Advertisements
प्रश्न
A trolley is pushed along a road with a force of 400 N through a distance of 60 m in 1 minute. Calculate the power developed.
Advertisements
उत्तर
Force applied, (F) = 400 N
Distance travelled, (S) = 60 m
Time, (t) = 60 s
So,
Work done = Force × Distance
= (400) (60) J
= 24000 J
Now, we can calculate the power of the body as,
Power = `"Work done"/"Time"` So , Power = `24000/60`W = 400 W
So , the power of this appliance is 400 W .
APPEARS IN
संबंधित प्रश्न
Define 1 watt of power.
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
Define average power.
A battery lights a bulb. Describe the energy changes involved in the process.
Name the physical quantity whose unit is watt.
Fill in the blanks with suitable words :
One watt is a rate of working of one ___________ per ___________.
A car of weight 20000 N climbs up a hill at a steady speed of 8 m/s, gaining a height of 120 m is 100 s. Calculate : power of engine of car.
Define power. Give the SI unit of power.
A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. (g = 10 m/s2)
Which one of the following statements about power stations is not true?
