Question

Find the speed of a stone which possess kinetic energy of 20J and a mass of 200 g​

Answer 1

Explanation:

Let v be the velocity of object

Mass of object , m=100 g=0.1 kg

Kinetic energy of object =20 J

⟹

2

1

×0.1v

2

=20

⟹v

2

=400

⟹v=20 m/s

Answer 2

$\huge \underline \green{\sf{ Answer :- }}$

Let v be the velocity of object 

Mass of object , m=100 g=0.1 kg

Kinetic energy of object =20 J

⟹21×0.1v2=20

⟹v2=400

$\small \underline {\sf{⟹ v = 20 m/s }}$