As shown below, an object with a mass of 5 kg is moving at a speed of 10 m/s. Another object with a mass of 10 kg is moving at a speed of 5 m/s. Which of the objects has higher kinetic energy?
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1 point
A. The objects have equal kinetic energy.
B. The 5 kg object has higher kinetic energy.
C. The 10 kg object has higher kinetic energy.
D. Both objects have zero kinetic energy.
To calculate the kinetic energy (KE) of an object, we can use the formula KE = 0.5 * mass * speed^2.
For the first object with a mass of 5 kg and a speed of 10 m/s, the kinetic energy is:
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, the kinetic energy is:
KE2 = 0.5 * 10 kg * (5 m/s)^2 = 0.5 * 10 kg * 25 m^2/s^2 = 125 J
Therefore, the first object with a mass of 5 kg moving at a speed of 10 m/s has a higher kinetic energy.
Therefore, the correct answer is B. The 5 kg object has higher kinetic energy.