Distinguish between work energy and power if a body of weight 10N is lifted from the floor to a table 2m above the calculate the potential energy gained. What happens to the energy if the body falls off the table and hits the floor

Answer 1

work = Force * distance in direction of force
In this case:
work = 10 Newtons up * 2 meters up = 20 Joules of work done
power in Joules = 20 / number of seconds it took

It gained 20 Joules of potential energy going up
During the fall it loses the potential energy but gains an equal amount of Kinetic energy
(1/2) m v^2 = 20 Joules
HOWEVER, when it hits the floor that 20 Joules is lost to heat and to moving floor planks around.

Answer 2

power in Joules = 20 / number of seconds it took
WHOOPS TYPO
power in *** WATTS*** = 20 / number of seconds it took
watts power is Joules of energy per seccond

Answer 3

I must learn to read what I wrote before hitting that button!