Question

A ball of mass 400 gram is thrown at a speed of 2 metre per second determine its kinetic energy ​

Answer 1

Hi there !!

Mass = 400 g = 0.4 kg

Velocity , v = 25 m/s

K.E = 1/2 ×mv²

= 1/2 ×0.4 × 25 ×25

= 125 Joules

Answer 2

Answer:

KE = 0.8 J

Explanation:

m = 0.4 kg

v = 2 m/s

KE = 1/2 x m x v^2

KE = 1/2 x 0.4 x 2 x 2

KE = 0.8 J