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Impulse on ball estimation using graphical method

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Suppose the force acting on a tennis ball (mass 0.065 kg) points in the +x direction and is given by the graph of Fig. 7-30 as a function of time.

Figure 7-30 in attached document.

(a) Use a graphical method to estimate the total impulse given the ball.
(b) Use a graphical method to estimate the velocity of the ball after being struck, assuming the ball is being served so it is nearly at rest initially.

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