Question

A stone of mass 750g is thrown vertically upward with a velocity of 10m/s find the potential energy

Answer 1

Answer:

37.5J

Explanation:

height reached = v^2/2g

H = 10*10/2*10 = 5 m

now PE = mgH ; m = 750/1000k = 0.75kg

PE = 0.75 * 10 * 5 = 37.5J

Note : g = 10m/s2

Answer 2

Answer:

37.5 J

Explanation:

$\displaystyle \text{Stone is thrown vertically upward at top of most point}\\\\\displaystyle \text{potential energy is equal to kinetic energy}$

Given :

Mass is 750 g

In term of kg :

Mass is 0.75 kg .

Velocity ( v ) = 10 m / sec

We have formula for kinetic energy :

K.E. = 1 / 2 m v²

Putting values now :

K.E. = 1 / 2 × 0.75 × 10 × 10

K.E. = 1 / 2 × 75 J

K.E. = 37.5 J

Since K.E . = P.E.

Thus potential energy of stone is 37.5 J  .