Work, Energy, and Power
What is power defined as, and what are its units?
The rate at which work is done or energy is transferred, measured in Watts (W) or Joules per second (J/s).
The total amount of work done, measured in Joules (J).
The force applied over a distance, measured in Newtons (N).
The displacement of an object, measured in meters (m).
A work-time graph shows work increasing linearly with time. What does the slope of this graph represent?
The instantaneous power.
The total work done.
The change in kinetic energy.
The average velocity.
The work done on an object is given by the function , where is in Joules and is in seconds. Find the power exerted on the object as a function of time.
A force N acts on an object moving with a velocity m/s. What is the instantaneous power delivered by the force?
10 W
6 W
16 W
W
A car is moving with a velocity of m/s, and a force of N is acting on it. What is the power being delivered to the car?
15 W
25 W
5 W
20 W
A force acting on an object is given by N, where is the position in meters. The object's velocity is given by m/s. Find the power exerted by the force at s, assuming .
96 W
48 W
24 W
144 W
On a work vs. time graph, which time interval indicates the greatest power output?
The interval with the steepest slope.
The interval with the smallest slope.
The interval with zero slope.
The interval with the longest time.

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A work vs. time graph shows that the work done increases from 10 J to 30 J over a time interval of 4 seconds. What is the average power during this interval?
5 W
7.5 W
10 W
20 W
The graph of power vs. time is given. What does the area under the curve represent?
The total work done.
The average power.
The change in velocity.
The instantaneous power.
What is power defined as?
The total amount of work done.
The rate at which work is done or energy is transferred.
The force applied over a distance.
The energy required to move an object.