Question

A body of mass 5kg is taken from a height of 3m to 6m.Calculate the following:

(i) Initial potential energy.

(ii) Final potential energy.

(iii) The change in total potential energy.​

Answer 1

Explanation:

i think 3rd answer is right answer

Answer 2

$\huge\underbrace\mathcal\pink{anSwer}$

Given:

m = 5kg

h1 = 3m

h2 = 6m

(i) Initial potential energy = mgh1

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 5 × 9.8 × 3

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 147 J

(ii) Final potential energy = mgh2

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 5 × 9.8 × 6

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 294 J

(iii) change in total potential energy

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 294 - 147

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 147 J