Question

A freely falling body takes 4 sec to reach the ground. One sec after release, the percentage of its potential energy, that is still reatined is

Answer 1

the total mechanical energy doesn't destroys , it just converts to either K.E or P.E

Answer 2

Answer:

93.75 percent

Explanation:

Time of descent (td) = √2h/g

4=√2h/g

16=2h/10

h=80m

After 1sec body is at a height of 75m from ground

mg(h)/mg(H)*100

75/80*100=93.75 percent