4)Define work and power. State their
units.
Answers
Answer:
Work is defined as a force causing the movement—or displacement—of an object. The SI unit of work is the joule (J) Power is the rate at which work is done or energy is transferred in a unit of time. The SI unit of power is Watts(W) Energy is defined as the ability to do work.
Answer:
1)physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity
2)Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. ... If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.
units Power (P) is the rate at which energy is transferred or converted. Thus, power equals work divided by time (P = W / t). The SI unit of power is the watt (W), in honor of Scottish inventor James Watt (1736 - 1819).04-Sep-2007