Which object has larger kinetic energy: a 500-kg object moving with a speed of 40 m/s or 1000-kg object moving at 20 m/s?
A) the 500-kg object moving at 40 m/s
B) Both have same kinetic energy.
C) the 1000-kg object moving at 20 m/s
D) Kinetic energy is independent of mass.
E) Kinetic energy is independent of speed.

Question

Quizplus · Accepted Answer

Kinetic energy is given by the formula KE = 0.5 * m * v^2. For the 500-kg object: KE = 0.5 * 500 * (40)^2 = 400,000 J. For the 1000-kg object: KE = 0.5 * 1000 * (20)^2 = 200,000 J. The 500-kg object has larger kinetic energy.

Which Object Has Larger Kinetic Energy: a 500-Kg Object Moving