Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Horse power is the unit of power. The horsepower used for electrical machines is defined as exactly 746 watt.
Classically, a horse exerting 1 H.P. can raise 330 pounds of coal 100 feet in a minutes, or 33 pounds of coal 1,000 feet in one minute, or, 1,000 pounds 33 feet in one minute.
APPEARS IN
संबंधित प्रश्न
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
A boy of mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate:
- the force of gravity acting on the boy,
- the work done by him against the force of gravity,
- the power spent by boy. (Take g = 10 m s-2)
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?
What is the relationship between Nm and dyne cm?
Write an expression for work done by a force depends?
Complete the following sentences:
Joule is the unit of .......
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
