Physics
A block of mass 20 kg is pulled up a slope as shown in the figure given below with a constant speed by applying a force of 200 N parallel to the slope from the initial position A to the final position B. Work done in moving the block from A to B is:
- 600 J
- 500 J
- 60 J
- 200 J
Related Questions
A coolie A takes 1 minute to lift a load to the roof of a bus whereas coolie B take 2 minutes to lift the same load to the roof of the same bus. The work done by B is:
- equal to work done by A
- greater than work done by A
- less than work done by A
- none of the above.
The energy of electron is 2.5 eV. When expressed in Joule, it is
- 1.6 x 10-19 J
- 4.0 x 10-19 J
- 3.2 x 10-19 J
- 0
The graph given below shows a force-displacement graph. What is the total work done by force on the body in displacement from x = 0 to x = 6 m ?
- 20 J
- 40 J
- 60 J
- 80 J
Assertion (A): When the displacement is normal to the direction of force, the work done is zero.
Reason (R): Work done depends on the angle between force and displacement.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false