What is the KE of a 1500 kg car going 30 m/s .
Was this the amount of work done on the car to make it reach this speed ( ignore drag and friction)?
If the car took 150 m to reach this speed, how great was the net force on car?
How much work does it take to lift a 20 kg book bag 4 m? Why do you have such a heavy bag?
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