Advertisements
Advertisements
प्रश्न
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
Advertisements
उत्तर
When the body travels at an angle to the direction of force applied, then the work done will be equal to the product of the displacement and the component of force in the direction of displacement.
So, work done is given by the following formula:
W = (F) (S) cos θ
Where,
(W) - Work done
(F) - Force
(S) - Displacement
(θ) - Angle between force and displacement
APPEARS IN
संबंधित प्रश्न
The S.I. unit of energy is .............
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
What is the relationship between Nm and dyne cm?
One labourer carried four pans of road metal through a distance of 100 metres. If he carries two pans of road metal through a 200 metre distance ______ work will be done.
Mention whether work is done or not in the following activity.
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | |
| 2. | Holding a doll | |
| 3. | Sitting in a bus | |
| 4. | Pushing a wall | |
| 5. | Digging soil |
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.
