Ian: New page: In this case we have $\mathbf{u}=5\mathbf{i}$ and $\mathbf{a}=-4\mathbf{j}$ Substituting these into the equation $\mathbf{v}=\mathbf{u}+\mathbf{a}t \ \$ ...

2010-04-13T14:58:35Z

New page: In this case we have <math>\mathbf{u}=5\mathbf{i}</math> and <math>\mathbf{a}=-4\mathbf{j}</math> Substituting these into the equation <math>\mathbf{v}=\mathbf{u}+\mathbf{a}t \ \</math> ...

New page

In this case we have
<math>\mathbf{u}=5\mathbf{i}</math>
and
<math>\mathbf{a}=-4\mathbf{j}</math>

Substituting these into the equation
<math>\mathbf{v}=\mathbf{u}+\mathbf{a}t \ \</math>
gives the velocity of the ball at time <math>t=4 \text{ s }</math> as:

<math>\mathbf{v}=5\mathbf{i}+(-4\mathbf{j})\times 4</math>

which gives

<math>\mathbf{v}=5\mathbf{i}-16\mathbf{j} \ \text{ m}{{\text{s}}^{\text{-1}}}</math>

Solution 8.2a - Revision history

Ian: New page: In this case we have \mathbf{u}=5\mathbf{i} and \mathbf{a}=-4\mathbf{j} Substituting these into the equation \mathbf{v}=\mathbf{u}+\mathbf{a}t \ \ ...

Ian: New page: In this case we have $\mathbf{u}=5\mathbf{i}$ and $\mathbf{a}=-4\mathbf{j}$ Substituting these into the equation $\mathbf{v}=\mathbf{u}+\mathbf{a}t \ \$ ...