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Impulse

My idea of impulse is still a bit weak from past questions I realised you have to find impulse by resolving on the same plane but why is that, for the question I attached what’s wrong with doing 0.25(52-28)=I
(edited 2 years ago)
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Original post by Student 999
My idea of impulse is still a bit weak from past questions I realised you have to find impulse by resolving on the same plane but why is that, for the question I attached what’s wrong with doing 0.25(52-28)=I


A few things. Starting with the fact that impulse is a vector, not a scalar.
The impulse corresponds to the change in momentum (mv, so a vector) and is average force * time (or the integral of force over the time interval). So again a vector.
So you need to work out the change in momentum in each dimension, then pythagoras to get the magnitude and trig to get the direction.
(edited 2 years ago)

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