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# Momentum and Impulse Vector Form Question watch

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2. (Original post by MAyman12)

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What problem are you having? How far have you got? What have you managed to do?
3. (Original post by MAyman12)

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Impulse =change in momentum =m(v-u)
4. 'Understanding Mechanics', we use this book as well
Firstly work out the final velocity using impulse=mass*(Final-Initial)
After you've got the velocity in the vector form, work out the magnitude of the vector to find the final SPEED.
The direction of the motion is the direction of velocity, so you can work out the scalar product of the vector of velocity and i, then divide it by (magnitude of velocity*magnitude of i)
this will give you cos(theta), you can find theta with your calculator.

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Updated: October 13, 2013
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