Question

what is the average power required for the first 40 sec to pull a block of mass 10 kg on a inclined plane uphill eith a coeffrcirnt of friction 0m4 such that it is pulled to uniform rate of 5m rvry sec after a time 3 sec from start​

Answer 1

Answer:

Explanation:

The sketch shows the forces acting on the box.

Note that the weight of a box of mass 5 kg is 5g where g = 9.8 ms–2

Since the vertical forces are in equilibrium, R = 5g

Therefore the maximum possible friction is F = μR = 0.4  5g = 19.6 N

The pushing force, 15 N, is less than this and so cannot overcome the

friction.

The box will not move.