Question

A 4.00 kg rock is rolling 10.0 m/s find its kinetic energy

Answer 1

KE = 1/2mv^2

1/2 of the mass in this equation is 2 bc 4 divides by 2 = 2.

The velocity squared in this equation is 100 because 10 * 10 = 100

2 * 100 = 200

The kinetic energy of the rock is 200 joules.

Hope this helps.