Ian: New page: Here we use the equation $\mathbf{v}=\mathbf{u}+\mathbf{a}t$ with $\mathbf{u}= 4\mathbf{i}+6\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}} and \mathbf{v}...$

2010-04-19T14:53:10Z

New page: Here we use the equation <math>\mathbf{v}=\mathbf{u}+\mathbf{a}t</math> with <math>\mathbf{u}=<math>4\mathbf{i}+6\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}}</math> and <math>\mathbf{v}...

New page

Here we use the equation <math>\mathbf{v}=\mathbf{u}+\mathbf{a}t</math> with

<math>\mathbf{u}=<math>4\mathbf{i}+6\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}}</math> and <math>\mathbf{v}=24\mathbf{i}+46\mathbf{j\text{ m}{{\text{s}}^{\text{-1}}}}</math>.

Also <math>t=20\text{ s}</math> whichh gives,

<math>24\mathbf{i}+46\mathbf{j}=4\mathbf{i}+6\mathbf{j}+\mathbf{a} \times 20</math>

So,

<math>20\mathbf{a}=20\mathbf{i}+40\mathbf{j}</math>
giving,

<math>\mathbf{a}=\mathbf{i}+2\mathbf{j} \text{ m}{{\text{s}}^{\text{-2}}}</math>

Solution 8.8a - Revision history

Ian: New page: Here we use the equation \mathbf{v}=\mathbf{u}+\mathbf{a}t with \mathbf{u}=4\mathbf{i}+6\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}} and \mathbf{v}...

Ian: New page: Here we use the equation $\mathbf{v}=\mathbf{u}+\mathbf{a}t$ with $\mathbf{u}= 4\mathbf{i}+6\mathbf{j}\text{ m}{{\text{s}}^{\text{-1}}} and \mathbf{v}...$