(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I'm really not good at motion. It just doesn't seem to come easily to me, which is kind of disapointing, because physics is my favourite subject.

Question: A body of mass 5kg is moving in a north easterly direction with a velocity of 28.3 m/s. If a westerly wind acts on it with a force of 73.5N what is the change in momentum after 8s.

2. Relevant equations

F = ma, a = v/s

???

3. The attempt at a solution

I figured i'd find the velocity of the force.

F = ma

73.5 = 5a

a= 14.7

a = v/t

v = 14.7 * 8

v = 117.6

difference in p = m(v-u)

p = 5(117.6-28.3)

But this doesn't give the right answer. The answer is 588 N s East.

I know i probably need to draw vectors and what not but the whole concept of vectors confuses me deeply. :(

Could you explain to me how the diagram would work? Would i need to use non-right trig? And also, what am i doing wrong?

I don't understand a lot of the concepts of vectors and motion, so try and explain it in the simplest way possible, because im not great at this stuff.

Any help is appreciated. Thanks :)

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# Homework Help: Year 11 motion/vector problem?

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