Question

What’s the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms? Use the formula, .

A.
3 m/s
B.
5 m/s
C.
7 m/s
D.
8 m/s
E.
10 m/s

Answer 1

the answer is 10 m/s

Answer 2

10 m/s

Step-by-step explanation:

K.E. = 100 J

m = 2 kg

Let v be the velocity of ball.

Us ethe formula for kinetic energy

K.E. = 1/2 m v^2

100 = 0.5 x 2 x v^2

100 = v^2

v = 10 m/s