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Clef
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there's a couple of problems that i have to give in at the end of this lunctime that i just can't work out how to approach or what formulas to use:
1. A 70g tennis ball falls 2 meters and bounces back up to a height of 1.9 meters
(a)How much kinetic energy does the tennis ball have?
(b)the ball compresses 10cm for a period of 2 seconds, what is the kinetic energy of the ball during this time?
2) a car is traveling at 75km/h up a hill. Assuming that gravity =9.8 ms-2, what is the maximum height that the car wil reach?
1. A 70g tennis ball falls 2 meters and bounces back up to a height of 1.9 meters
(a)How much kinetic energy does the tennis ball have?
(b)the ball compresses 10cm for a period of 2 seconds, what is the kinetic energy of the ball during this time?
2) a car is traveling at 75km/h up a hill. Assuming that gravity =9.8 ms-2, what is the maximum height that the car wil reach?