Question

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:

 

Options

• 600 J

• 500 J

• 60 J

• 200 J

Answer 1

600 J

Explanation:

The applied force is 200 N parallel to the slope, and the displacement along the slope AB is 3 m. Hence \[W = FS = 200 \times 3 = 600\text{ J}\]. The mass of the block is not needed for work done by the applied force, so the other options are wrong.