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1. Students sometimes say that the force of gravity on an object is 9.8 m/s2. What...

1. Students sometimes say that the force of gravity on an object is 9.8 m/s2. What is wrong with this view? Explain
2. Does a car kinetic energy changes more when the car speeds up from 15 to 20 m/s or from 25 to 30 m/s? Explain

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