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A race car starts from rest and travels east along a straight and level track. For the first 5.0 s of the car's motion, the eastward component of the car's velocity is given by _x(t)=(0.820m/s3)t2.

Verified Answer :

The solution to your problem is as follows:

a=dv/dt=20.82twhat time velocity is 13.7 solve 13.7=0.82t^2   t=sqrt(13.7/0.82)  =4.51 sUse the time in the acceleration expression a= 20.82*4.51=7.39m/s^2


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