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What is the velocity of the mass at a time t? you can work this out geometrically with the help of the hints, or by differentiating the expression for r' (t) given in the introduction. (figure 2)

Respuesta :

The angle between r (t = o) and r (t), is diresctly related to the direction pf the verlocity vector which is when t = 0, r(t = 0) = R(i^)θ = ωt
So, the speed of the mass at time (t0 is v(t) = ωR (v(t) in terms of ω and R)

the answer is v(t) = − Rωsin(ωt) + Rωcos(ωt)j^

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