Class Management I Help i-D Kinematics Begin Date: 8/22/2016 12:00 00 AM -Due Da

Question

Class Management I Help i-D Kinematics Begin Date: 8/22/2016 12:00 00 AM -Due Date: 2/6/20178 00:00 AM End Date: 5/5/2017 11:59:00 PM S8%) Problem 3: A particle's position along the xaxis is described by the function where t is in seconds, xis in meters, and the constants A and B are given below. Randomized variables A -4.9 m/s B 3.1 m/s2 50% Part (a) Input an expression, in terms of the variables A. B, and t, for the velocity of the particle as a function of time. Grade Summary Potential Submissions Attempts remaining: 2 per attempt) 1 3 detailed view I give up! Feedback deduction per feedback Hints for a deduction. Hints remaining 2 -The velocity is the derivative of position with respect to time. A 50% Part At what time, in seconds, is the particle's velocity zero?

Explanation / Answer

a)

V(t)=dx(t)/dt

V(t)=A+2Bt

V(t)=-4.9+2*3.1*t

V(t)=-4.9+6.2t

b)

Given V(t)=0

-4.9+6.2t=0

t=4.9/6.2=0.79 s

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