Question

A horse pulling a cart exerts a steady horizontal pull of 300N and walks at the rate of 4.5 kph. How much work is done by the horse in 5 minutes?

Answer 1

Given: A horse pulling a cart exerts a steady horizontal pull of 300 N and walks at the rate of 4.5 kph.

To find:  How much work is done by the horse in 5 minutes?

Solution:

• Now we have given that a horse pulling a cart exerts a steady horizontal pull of 300 N, so Force is 300 N.

• Distance travelled by horse in 5 minutes is:

                    4.5 x 5 / 60 = 0.375 km = 375 m

• Work done = Force x displacement

                    W = 300 X 375

                    W = 112500 N

                    W = 112.5 kN

Answer:

            The work done by horse in 5 minutes is 112.5 kN.