Question

The kinetic energy of a ball weighing 0.5 kg moving with a Velocity of 4m/s will be...........?

Answer 1

mass = 0.5 kg

velocity = 4 m/s

kinetic energy is given as:

$ke = \frac{1}{2} m {v}^{2} = \frac{1}{2} \times 0.5 \times {4}^{2} = 4 \: joule$

kinetic energy is 4 joule.

Answer 2

The kinetic energy of the ball = ½ m * v^2 where m is the mass of the ball whereas v is the velocity at which it is moving,

Hence, K = ½ * 0.5 * 4^2

K = ½ * 5/10 * 4 * 4

K = ½ * ½ * 4 * 4

K = 4 J