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1. Estimate the power required, in hP, for a 780-kg car to climb a 15° slope...

1. Estimate the power required, in hP, for a 780-kg car to climb a 15° slope at a constant speed of 70 mi/h. (Assume 100% efficiency.)

2. A 159-g baseball moving in the +x direction with a speed of 25.1 m/s strikes a fence at a 45-degree angle and rebounds in the +y direction.If the impact with the fence lasts 24.7 milliseconds, determine the magnitude of the average force exerted on the baseball by the fence. (Hint: use the change in momentum that you calculated in the previous problem.)

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