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2 Baseball A pitcher throws a baseball at 90 mph (40 m/s). Suppose that the pitcher takes At-0.07 s to accelerate the ball. (a) (10 pts) Find the acceleration of the ball during the throwing motion, in m/s2. Hint (b) (10 pts) How many times larger than g is the acceleration of the bal? You should (b) (10 pts) A baseball has a mass of 0.14 kg. Estimate the force exerted by the pitcher assume the acceleration is constant so that the velocity change equals Δν = a × Δ find approximately 54g. A human can (probably) survive 25g for 1 second. on the ball (hint: make the same assumption as in part a).

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Acceleration and force of ball through by pitcher

usiny meon equah tm v(上) = Vata大- 4-о -533.33 $33.33 9.81 9

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