Which unit represents the rate at which work is done or energy is transferred?
A. Kilogram
B. Joule
C. Watt
D. Newton
C. Watt
The unit that represents the rate at which work is done or energy is transferred is the watt. To understand why, let's break down the options and their relevance to work and energy:
A. Kilogram: The kilogram is a unit of mass, not directly related to work or energy.
B. Joule: The joule is the unit of work and energy. It represents the amount of energy transferred when a force of one newton is applied over a distance of one meter. The joule is not a rate but rather a measure of the total amount of work/energy.
C. Watt: The watt is the unit of power, which represents the rate at which work is done or energy is transferred. It is equal to one joule per second. So, when one joule of work or energy is transferred per second, the power is equal to one watt.
D. Newton: The newton is the unit of force, not directly related to work or energy.
Therefore, the correct answer is C. Watt.