A car with a mass of 1290 kilograms is being driven at 17.9 meters per second when it runs into a tree. a. What is the change in kinetic energy of the car? Include units in your answer b. What work is done in pushing in the front of the car? Include units in your answer c. If the front of the car is pushed in 44.4 centimeters, what is the magnitude of the force exerted on the car? Include units in your answer.

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Q: - Who did more work? Explain

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Q: 0.8 0.6 0.4 0.2 0.25 0.50 0.75 1.00 Position, x (m) Force, F (N)

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.