Question

A girl performs 300 J of work lifting a weight to a height of 2 m. How much

force does she apply? Assume there is no friction.

Answer 1

A lift requires 300J to complete 2m of vertical distance aka height. We must find force exerted by a girl on the object that was lifted 2m vertically.

So we divide.

`F=(W)/(h)=\frac{300\mathrm{J}}{2\mathrm{m}}=150\mathrm{N}`

Hope this helps.

Answer 2

Answer: The force applied by the girl is 150 N

Step-by-step explanation:

Work is defined as the force that is causing the movement or displacement of an object.

Mathematically,

`W=F* d`

where,

W = work done by the girl = 300 J

F = Force applied by the girl = ?

d = displacement = 2 m

Putting values in above equation, we get:

`300J=F* 2m\\\\F=(300J)/(2m)=150N`

Hence, the force applied by the girl is 150 N