problem03_13

University Physics with Modern Physics with Mastering Physics (11th Edition)

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Unformatted text preview: 3.13: Take +y to be upward. Use the vertical motion to find the time in the air: v 0 y = 0, a y = -9.80 m s 2 , y - y 0 = -( 21.3 m - 1.8 m) = -19.5 m, t = ? y - y 0 = v 0 y t + 1 a y t 2 gives t = 1.995 s 2 Then x - x 0 = 61.0 m, a x = 0, t = 1.995 s, v 0 x = ? x - x 0 = v 0 x t + 1 a x t 2 gives v0 x = 30.6 m s. 2 b) v x = 30.6 m s since a x = 0 v y = v 0 y + a y t = -19.6 m s 2 v = v x + v 2 = 36.3 m s y ...
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