265_Dynamics 11ed Manual

# 265_Dynamics 11ed Manual - The man at the window A wishes...

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Engineering Mechanics - Dynamics Chapter 14 Problem 14-34 The block of weight W is pressed against the spring so as to compress it a distance δ when it is at A . If the plane is smooth, determine the distance d , measured from the wall, to where the block strikes the ground. Neglect the size of the block. Given: W 10 lb = e 4f t δ 2f t = f 3f t = k 100 lb ft = g 9.81 m s 2 = Solution: θ atan f e = Guesses v B 1 ft s = t 1s = d 1f t = 1 2 k δ 2 Wf 1 2 W g v B 2 = B cos θ () t = 0 fv sin θ () t + g 2 t 2 = v B t d Find v B t , d , () = v B 33.08 ft s = t 1.369 s = d 36.2 ft
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Unformatted text preview: The man at the window A wishes to throw a sack of mass M onto the ground. To do this he allows it to swing from rest at B to point C , when he releases the cord at = 1 . Determine the speed at which it strikes the ground and the distance R . Given: 1 30 deg = h 16 m = L 8 m = g 9.81 m s 2 = M 30 kg = Solution: M gL cos 1 ( ) + 1 2 M v C 2 = v C 2 gL cos 1 ( ) = v C 11.659 m s = 263...
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