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2 cards from this section. Quick, good the night before a test.
What is the formula for work?
Think about the definition of work involving force and movement.
What unit is used to measure energy?
Recall the units for work and energy are the same.
What is the formula for calculating work?
Remember to include the angle in the work formula.
True or False: Energy can be created and destroyed.
Recall the conservation principles we discussed.
An electric motor lifts a 100 kg weight to a height of 10 meters in 5 seconds. Calculate the work done and the power output of the motor.
Use the weight of the object to find work done and then apply the power formula.
A car travels 60 km at a speed of 15 m/s. Calculate the work done if the force required to maintain that speed is 400 N.
Remember to calculate time using distance and speed.
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