Question

A body of mass 4 kg is taken from a height 5 m to a height 10 m. Find the increase in potential energy.​

Answer 1

Explanation:

Given, mass of the body, m=4kg ;

increase in height of the body, h=(10−5)=5m

Increase in potential energy,

ΔEp=mgh

=(4)×(10)×(5)=200J

Answer 2

Answer:

196 joules

Explanation:

potential energy = mgh

calculate potential energy at height 10 m

then calculate potential energy at 5m

find their

p.e. at h=10

p1= 4*9.8*10

p1=392 joules

p.e. at h= 5

p2= 4*9.8*5

p2=196 joules

potential energy difference=p1-p2

= 392-196= 196 joules