2. [-/1 Points]
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MY NOTES
SPRECALC8 8.6.031.
Consider the following.
u = (-7, 9), v = (1, 1)
(a) Calculate $\text{proj}_\mathbf{v} \mathbf{u}$.
$\text{proj}_\mathbf{v} \mathbf{u} =$
(b) Resolve $\mathbf{u}$ into $\mathbf{u}_1$ and $\mathbf{u}_2$, where $\mathbf{u}_1$ is parallel to $\mathbf{v}$ and $\mathbf{u}_2$ is orthogonal to $\mathbf{v}$.
$\mathbf{u}_1 =$
$\mathbf{u}_2 =$
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3. [0/1 Points]
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MY NOTES
SPRECALC8 8.6.047.
The force $\mathbf{F} = 4\mathbf{i} - 3\mathbf{j}$ moves an object 7 ft along the x-axis in the positive direction. Find the work done (in ft-lb) if the unit of force is the pound.
7
ft-lb
