Solution 8.7c
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(New page: The maximum height is when the <math>\mathbf{j}</math> component of the velocity is zero. Using <math>\mathbf{v}=\mathbf{u}+\mathbf{a}t \ </math> with <math>\mathbf{u}=8\mathbf{i}+10\mat...)
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Revision as of 12:17, 18 April 2010
The maximum height is when the \displaystyle \mathbf{j} component of the velocity is zero.
Using \displaystyle \mathbf{v}=\mathbf{u}+\mathbf{a}t \ with \displaystyle \mathbf{u}=8\mathbf{i}+10\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}} and \displaystyle \ \mathbf{a}=-10\mathbf{j}\ \text{ m}{{\text{s}}^{\text{-2}}} ,
\displaystyle \mathbf{v}=8\mathbf{i}+10\mathbf{j}+(-10\mathbf{j})t \
Thus the ball is at its maximum height when \displaystyle t=1\text{ s}.
