If a ball has a velocity of 15 m/s and a kinetic energy of 225 J, what is the mass of the ball?

Answer: 2 kg.

Explanation: Kinetic Energy is expressed as the product of mass and squared of velocity over two KE=1/2 mv². Derive the following expression for mass. m=2KE/v² then substitute the values 2 (225J) / (15 m/s) ² = 2kg

Kinetic energy = 1/2 * m * v^2

Kinetic energy = 225J

Velocity v = 15m/s

225 = 1/2 * m * 15^2

225*2 = 225 * m

450 = 225m

m = 450/225

m = 2kg

Mass is 2kg