Question

A football player exerts 5000J of work pushing a tire 50m across a feild. How much force did the football player apply to the tire

Answer 1

Remember that the equation for work is:

`w = fd \cos( x)`
Where w = work, f = force, and x is the angle between the force and the direction of motion.

5000J is the amount of work, w, exerted. The distance, d, is 50m. x is 0 because the direction of motion is the same as the force (I'm assuming). Cos0 = 1. So you have:

`5000 = (f)(50)(1)`
Just solve for f. F = 5000/50=100 N of force.