An object with a mass of 5 kg is moving at a speed of 10 m/s, another object with of mass of 10 kg is moving at a speed of 5 m:s which of the objects has higher kinetic energy

Answer 1

Kinetic energy is given by the formula:

KE = 0.5 * mass * velocity^2

For the first object, with a mass of 5 kg and a speed of 10 m/s:

KE1 = 0.5 * 5 kg * (10 m/s)^2 = 0.5 * 5 kg * 100 m^2/s^2 = 250 J

For the second object, with a mass of 10 kg and a speed of 5 m/s:

KE2 = 0.5 * 10 kg * (5 m/s)^2 = 0.5 * 10 kg * 25 m^2/s^2 = 125 J

Hence, the object with a mass of 5 kg, moving at a speed of 10 m/s has a higher kinetic energy of 250 J compared to the object with a mass of 10 kg, moving at a speed of 5 m/s with a kinetic energy of 125 J.