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Activity 10.2.4 .
Suppose a moving object in space has its velocity given by
\begin{equation*}
\vv(t) = (-2\sin(2t)) \vi + (2 \cos(t)) \vj + \left(1 - \frac{1}{1+t}\right) \vk\text{.}
\end{equation*}
A graph of the position of the object for times
\(t\) in
\([-0.5,3]\) is shown in
Figure 10.2.9 . Suppose further that the object is at the point
\((1.5,-1,0)\) at time
\(t=0\text{.}\)
(a)
Determine
\(\va(t)\text{,}\) the acceleration of the object at time
\(t\text{.}\)
(b)
Determine
\(\vr(t)\text{,}\) position of the object at time
\(t\text{.}\)
(c)
Compute the position, velocity, and acceleration vectors of the object at time
\(t=1\) and plot these vectors using
Figure 10.2.9 .
Figure 10.2.9. The position graph for the function in Activity 10.2.4
(d)
Give the vector equation for the tangent line,
\(\vL(t)\text{,}\) that is tangent to the graph of
\(\vr(t)\) at
\(t = 1\text{.}\)