Question

A body of mass 4 kg is taken a hight of 5m to a hight of 10 m . find the increases in potentiai energy .

Answer 1

Answer:

potential enery is mgh

change in potential energy is mg {h₂ - h₁}

Explanation:

so 4 * 10 * [10 - 5 ] =200 j

Answer 2

Answer:

100% or 20g

Explanation:

We know potential energy is given by mgh, where m is the mass, g is gravitational acceleration and h is the height of object from reference point( mostly earth surface ).

  When h = 5 m,

Potential energy = mgh

              = 4 kg * g * 5 m

              = 20g  kg m

 When h = 10 m,

Potential energy = mgh

               = 4 kg * g * 10 m

               = 40g  kg m

Increase in energy = ( 40 - 20 )g kg m

          = 20g   kg m

Hence potential energy is increased by 20g( g is gravitational acceleration ).  Or, by 100 %.