Question

A ball of mass 0.5 kg has100 J of kinetic energy. What is the velocity of the ball?

Answer 1

Answer:

10 m/s

Explanation:

K.E = 1/2 mv²

100 = 1/2 ×0.5 ×v²

200/0.5= v²

v=√100

v= 10m/s

Answer 2

Velocity of the ball = 10 metres per second

Explanation:

Kinetic energy  is energy possessed by an object in motion. It is directly proportional to the mass of the object and to the square of its velocity.

K.E. = 1/2 m v2.

Where m is the mass of the object in kilograms, KE is the kinetic energy in Joules, velocity v is expressed in metres per second.

Give 100 = 1/2 (0.5) v^2

v^2 = 100 * 2 / 0.5 = 100

Velocity = root of 100 = 10 m/s