Unformatted text preview: Reflect: If some bricks are removed, so the weight of the pallet is reduced, the system remains at rest. The friction force on the crate is equal to the new weight of the pallet and is less than m s n . g F x 5 a x 5 w b 5 T 5 266 lb T 2 w b 5 g F y 5 ma y T 5 f s 5 266 lb T 2 f s 5 g F x 5 ma x f s 5 m s n 5 1 0.666 21 400 lb 2 5 266 lb. n 5 400 lb. n 2 w C 5 g F y 5 ma y ( a ) ( b ) x y w b T a 5 x y w c 5 400 lb n f s T f s 5 m s n . w C , f k 5 m k n 5 1 0.30 21 2.5 21 0.65 2 mg 5 1 0.30 / 0.0050 21 5.2 N 2 5 310 N f k 5 m k n 5 1 0.0050 21 2.5 21 0.65 2 mg 5 5.2 N x y w u 5 0.65 w n n a 5 n 5 w u / 2. 2 n 2 w u 5 g F y 5 ma y Applications of Newton’s Laws 515...
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 Spring '07
 Shoberg
 Force

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