Question

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 1

Step-by-step explanation:

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

Answer 2

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