- #1

ravsterphysics

- 57

- 1

Poster has been reminded to use the Homework Help Template in schoowork posts here

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## Homework Equations

I used F=ma to calculate F and pythag theorem to calculate slope lengths

## The Attempt at a Solution

On the left hand side (angle 35) the slope length is 636m, on the right hand side (angle 25) the slope length is 365m.

Now, in my notes I know that F=ma and since there is an angle inbetween, to calculate work done the formula is:

Work done = (F)(Cos,theta)(Distance)

so we should use cos35 and cos 25 but on the videos and mark scheme they use sin instead of cos??

Could someone explain why we use sin and not cos?

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