191_Dynamics 11ed Manual

191_Dynamics 11ed Manual - Engineering Mechanics Dynamics...

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Engineering Mechanics - Dynamics Chapter 13 Solution: Σ F t = ma t ; mg ( )sin θ () ma t = a t g sin () = d y d s sin () = ν d a t d s = g sin () ds = However d y = d s sin ( ) 0 v v v d 0 h y g d = v 2 2 gh = v 2 gh = Q.E.D Problem 13-59 The sled and rider have a total mass M and start from rest at A ( b , 0). If the sled descends the smooth slope, which may be approximated by a parabola, determine the normal force that the ground exerts on the sled at the instant it arrives at point
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