Question

A horse performs 15000 joules of work pulling a wagon for 20 seconds. What is the horse's power?

Answer 1

Answer:

To find the horse power per second. Divide 15000 by 20( 15000÷20 ). The answer is 750.

Answer 2

GIVEN :

Energy = 15000 joules

Time = 20 seconds

TO FIND :

Calculate the horse's power to pull the wagon.

SOLUTION:

• Simply speaking power refers to the work done by an object per unit time.
• In this case the horse is involved in doing the work to pull the wagon.

Power or P = E/t

• where, E is represented for the energy in joule and t stands for the time in joule.
• For the above question, the horse power will be:

Horse's Power = 15000/20

Horse's Power = 15000/20 = 750 W

• The W or watt is the unit for power.
• Thus, the horse's power in this case is 750 W