Advertisements
Advertisements
प्रश्न
The work done on an object does not depend on the :
विकल्प
displacement
angle between force and displacement
force applied
initial velocity of the object
उत्तर
The work done on an object does not depend upon the initial velocity of the moving object.
Therefore, the answer is, (d) Initial velocity of the object.
APPEARS IN
संबंधित प्रश्न
Work done = Force × ........................................
No work is done by a force if the body
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)
State the law of conservation of energy.
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
The work done on an object does not depend on ______.
When you move upstairs, do you perform some work?
Define 'joule'.
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
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 |
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.