A0.140-kg baseball is dropped from rest. it has a speed of 1.20 m/s just before it hits the ground, and it rebounds with an upward speed of 1.00 m/s. the ball is in contact with the ground for 0.0140 s. what is the average force exerted by the ground on the ball during the time of contact?

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

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Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?