92_Dynamics 11ed Manual - Engineering Mechanics Dynamics t1...

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Engineering Mechanics - Dynamics Chapter 12 Guess t 1 1s = Given s p t 1 () 2 π r 3 = t 1 Find t 1 () = t 1 35.58 s = v 1 vt 1 () = a t1 a t t 1 () = a n1 v 1 2 r = a 1 a t1 2 a n1 2 + = v 1 43.0 m s = a 1 6.52 m s 2 = * Problem 12–124 The car travels around the portion of a circular track having a radius r such that when it is at point A it has a velocity v 1 which is increasing at the rate of d v /d t = ks . Determine the magnitudes of its velocity and acceleration when it has traveled three-fourths the way around the track. Given: k 0.002 s 2 = r 500 ft = v 1 2 ft s = Solution: s p1 3 4 2 r = a t v s p v d d = ks p = Guess v 1 1 ft s = Given 0 v 1 v v d 0 s p1 s p ks p d = v 1 Find v 1 () = a t1 ks p1
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