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4 cards from this section. Quick, good the night before a test.
What is the formula for work?
Think about the forces acting on an object and the distance moved.
Define kinetic energy.
Consider a moving car.
Which of the following describes work?
Think about what happens during lifting something.
True or False: Power is the total work done over all time.
Remember the distinction between power and work.
A car accelerates from rest to a speed of 20 m/s in 10 seconds. If its mass is 800 kg, calculate the work done on the car and the power output during this time.
Use the kinetic energy formula to find work, and divide by time for power.
If a lift raises a 500 kg load 10 meters, calculate how much work is done and how much potential energy is gained.
Work done against gravity is equal to the potential energy gained.
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