ch04-p054 - 54. We apply Eq. 4-21, Eq. 4-22 and Eq. 4-23....

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54. We apply Eq. 4-21, Eq. 4-22 and Eq. 4-23. (a) From Δ xv t x = 0 , we find 0 40 m / 2 s 20 m/s. x v == (b) From Δ yv t g t y =− 0 1 2 2 , we find () 22 1 0 2 53 m (9.8 m/s )(2 s) / 2 36 y v =+ = m/s. (c) From vv g t y y 0 with v y = 0 as the condition for maximum height, we obtain
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