Question

A block of mass 5 kg is pulled along a horizontal surface by applying a force at an angle 37° with the horizontal. The friction coefficient between the block and the surface is 0.5. If the block travels at constant velocity, find the work done by this applied force during a displacement 4 m of the block.
1. 400J
2. 800J
3.800/11J
4. 250/11​

Answer 1

3. is correct option

answer is 800/11J

Answer 2

Answer:

$\frac{250}{11} \times \frac{4}{5} \times 4 = \frac{800}{11} j.$