Advertisements
Advertisements
प्रश्न
If the power of a motor is 100 kW, at what speed can it raise a load of 50,000 N?
Advertisements
उत्तर
Power is the product of force and velocity.
P = Fv
`:. v = P/F = (100 xx 10^3)/50000 = 2 ms^(-1)`
APPEARS IN
संबंधित प्रश्न
How is the unit horsepower related to the S.I. unit of power?
A satellite revolves around the earth in a circular orbit. What is the work done by the force of gravity? Give reason.
What are the S.I. and C.G.S units of work? How are they related? Establish the relationship.
Name the quality which is measured in kW.
What do you mean by a centrifugal force?
What is the work done when the force on the object and the displacement of the object are perpendicular to each other?
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s. Compare the power developed by the persons A and B.
How is 1 kgf related to the SI unit of force?
A bullet fired against a window glass pane makes a hole in it without any cracks while a stone striking the same glass pane smashes it; explain with reason.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
