Question

A horse moved a sleigh 1.00 kilometer by applying a horizontal 2000 newton force on its harness for 45.0 minutes . What is the power of the horse

Answer 1

Work = (force) x (distance)

= (2,000 N) x (1,000 m)

= 2,000,000 joules


Power = (work done) / (time to do the work)

= (2,000,000 joules) / (45 minutes)

= ( 44,444 and 4/9) joules per minute

= 740.74 joules per second = 740.74 watts .

Note: This is almost exactly 1 "horsepower".
1 horsepower = 746 watts .