Asked by ABAINEH
49. Which one of the following statements is the best definition of power in physics?
A. Power is the force applied to an object divided by time
B. Power is the energy an object possesses due to its motion.
C. Power is the ability to apply a force over a large distance.
D. Power is the rate at which work is done or energy is transferred.
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D. Power is the rate at which work is done or energy is transferred.
Explanation: Power = work/time (P = dW/dt), measured in watts (1 W = 1 J/s). For a constant force moving an object at velocity v, P = F · v. Options A, B, and C describe different concepts (A is incorrect units, B is kinetic energy, C is vague and not power).
Explanation: Power = work/time (P = dW/dt), measured in watts (1 W = 1 J/s). For a constant force moving an object at velocity v, P = F · v. Options A, B, and C describe different concepts (A is incorrect units, B is kinetic energy, C is vague and not power).
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