4 - Exe rcises 1. (a) v = (6t 2) i 3t 2 j = 10i 12 j m / s;...

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Unformatted text preview: Exe rcises 1. (a) v = (6t 2) i 3t 2 j = 10i 12 j m / s; (b) a = 6i 6tj = 6i 24 j m / s 2 , (c) a a v = 6i 12 j m / s 2 . 2. (a) 0.5i 1.5 j + 2k m / s; (b) v 1 = v 2 a t = 40i 10 j 2k m / s 4. (a) 350 m; (b) 250 m, 37 N of E; (c) 10 m / s, 37 N of E; (d) 14 m / s ; (e) a av = (10 j 20i ) / 25 = 0.8i + 0.4 j m / s 2 10. From Example 4.2 : sin 2 = R g / v 2 thus = 31.4 or 58.6 26. (a) v x = 20 m/s, v o y = 25.4 m / s so v = 32.3 m / s and = 51.8 Then, R = v 2 sin 2 / g = 104 m; (b) H = v o y 2 / 2g = 32.9 m 31. (a) and (b) x = 200 = (50 cos 30)t, so t = 4.62 s. Using this t in y = 50 sin 30 t 4.9t 2 = 10.9 m. It would hit the wall. (b) v y = 25 g(4.62) = 20.3 m / s. tan = v y / v x so = 25.1 below the horizontal. 40. With r = 35,800 + 6400 = 42,200 km, and T = 24 3600 s, a = 0.223 m / s 2 44. 44. v 2 = a r leads to v = 19.4 m / s 48. (a) v BA = v B v A = 3i + 4 j m / s (b) v...
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This note was uploaded on 05/01/2011 for the course ELECTRIC MAT351 taught by Professor Ahmettantuni during the Spring '10 term at Abant İzzet Baysal University.

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4 - Exe rcises 1. (a) v = (6t 2) i 3t 2 j = 10i 12 j m / s;...

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