Question

Calculate the work done by a force of 30N in lifting of 2kg to a height of 10m

Answer 1

Potential energy = mgh
=2×10×10=200J
Potential Energy=Workdone=200J

Answer 2

Answer:

We know that,

Work (W) = Force (F) × Displacement (s)

Therefore,

W = 30 x 10 =300J

But, the force exerted by the Gravity, = Mg

Hence, negative work done my displacement = Mgh

= 2(-10)(10)

=-200

Therefore Work done = 300 + (-200)

• =100J