Advertisements
Advertisements
Question
A machine raises a load of 750 N through a height of 16 m in 5 seconds. Calculate the power at which the machine works.
Advertisements
Solution
Power = `("Force"xx"Distance")/"Time"`
=`(750xx16)/5"watt"`
= 2400 watt.
= 2.4 KW.
RELATED QUESTIONS
A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions
1) Is the stone moving with a uniform or variable speed?
2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?
3) What kind of force acts on the hand and state its direction?
A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road.
Who does more work against the force of gravity and why?
How is kilowatt hour related to joule?
Name the quality which is measured in eV
Name two places in india where electricity is generated from nuclear power plants.
What do you mean by equilibrium of a body?
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?
1 kWh = ______ J.
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person walks on a levelled road.
