Question

Calculate the following: a) How much work is required to lift a 35 kg object from the ground 3.0 m into the air? b) How much gravitational potential energy did this object gain?

Answer 1

Explanation:

work done =force×displacenent

=mgh

=35×10×3

=1050j

gravitational potential energy=GMm[1/r1^2-1/r2^2]

where M = mass of planet

m=mass of earth

PRODUCT OF G×M IS 3.98 (SEE ATTACHEMENT)

P.E=3.98×35[0-1/9]

=15.47j

i am not sure about the result but method is right