Question

A body of mass 10 kg is taken from a height of 3m to 9m. The increase in Potential Energy of the body is: (g=10m/s)​

Answer 1

Answer:

increase in potential energy=600 joules

Explanation:

PE=mgh

PE@3m=10*10*3=300joules

PE@9m=10*10*9=900 joules

now increase in potential energy 900-300=600joules

Answer 2

Answer: Increase in P. E= 600

Explanation:

P. E. =mgh

where m= 10kg

g=10m/s^2

h=9m

but we have to find out change in P. E.

Therefore, we have to consider change in height

change in height= 9m-3m =6m

thus,

Change in P.E.(Increase in P.E.) is,

P.E.=mgh

=10*10*6

=100*6

P. E.=600

Hence, Increase in P. E. is equal to 600 kg-m^2/s^2