Advertisements
Advertisements
प्रश्न
Write an expression for work done by a force depends?
Advertisements
उत्तर
Work done = force x displacement x cos 0
or, W = Fd cos 0
APPEARS IN
संबंधित प्रश्न
State the S.I. unit of work and define it.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.
Name the physical quantity whose SI unit is Nm.
Fill in the boxe to show the corresponding energy transformation.

A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
Work done by this force at any instant is ______.
