(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A car moves on a circular track of constant radius b. If speed of car varies with time t according to v = ct, where c is a positive constant, show that the angle between the velocity vector and the acceleration vector is 45 degrees at time t=√b/c. (Hint: At this time the tangential and normal components of the acceleration are equal in magnitude.

2. Relevant equations

r= ib sin(ωt) + jb cost(ωt)

r=r[itex]_{e}r[/itex]

a=v^2/b

3. The attempt at a solution

Few ideas:

r=1/2ct^2, v=ct, a=c

At time t=√b/c, [itex]_{a}r[/itex]=[itex]_{a}t[/itex], so v^2/b=c?

I just really need a hint to get started in the right direction is all.. :[

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# Homework Help: Nonuniform circular motion problem.

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