Question

A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the horse to pull the plow 100 meters in 5 minutes?

Answer 1

`10` `"kJ"`

Explanation:

`F` (the force) is `100"N"`

`d` (the distance) is `100"m"`

The time is useless since the work is given by the equation `w=Fdcostheta`

Now, `theta` is the angle between the direction of the applied force and the direction of the motion of the object, in this case it is `0` because the motion of the plow is in the same direction of the applied force (of the horse)

Substituting the values the answer is,

`w=Fdcostheta`

`color(white)w=100(100)(cos0)`

`color(white)w=100(100)(1)`

`color(white)w=10000"J"`

`color(white)w=10"kJ"`