Question

A book has been lifted 1.5 meters into the air giving it 30J of potential energy. How much force was used to lift it

Answer 1

Force on the object is 20 N

Step-by-step explanation:

As we know that work done to raise the book from initial position to final position is known as potential energy stored in it

So here we know that

`U = F.s`

here we know that

U = 30 J

s = displacement = 1.5 m

so we have

`30 = F(1.5)`

`F = 20 N`