A 5.25-kg watermelon is dropped from rest from the roof of a 47.0-m-tall building and feels no appreciable air resistance.
(a) Calculate the work done by gravity on the watermelon during its displacement from the roof to the ground.
J

(b) Just before it strikes the ground find the watermelon's kinetic energy?
J

Just before it strikes the ground find the watermelon's speed?
m/s

Question

A 5.25-kg watermelon is dropped from rest from the roof of a 47.0-m-tall building and feels no appreciable air resistance.
(a) Calculate the work done by gravity on the watermelon during its displacement from the roof to the ground.
  J

(b) Just before it strikes the ground find the watermelon's kinetic energy?
  J

Just before it strikes the ground find the watermelon's speed?
  m/s

ookawaiioo · Answer

(a)Work of gravity  = Force(mg)* Distance

ookawaiioo · Answer

(b) Same answer as A, since work is Kinetic/potential/heat/electric energy

shamim · Answer

Can u tell me the potential energy of waterlemon when it is on the roof.

shamim · Answer

P.E=mgh

shamim · Answer

Work done will b equal to p.E

shamim · Answer

So w=mgh

shamim · Answer

Feel free to ask for more clarification

shamim · Answer

I wanna talk abt b and c when u will b online