Question

Why were the calculations in the perpendicular direction necessary for http://imgur.com/WmzdPi1 and not for http://imgur.com/XEYMwwN ?

Answer 1

@Directrix @dan815

Answer 2

other way round, my bad

Answer 3

cuz u need to know its acceleration on the ramp

Answer 4

and force of friction is normal to the surface so

Answer 5

so u gotta find Fn and then do u*Fn

Answer 6

I see thanks!

Answer 7

do a practice problem i will explain or just post that problem here we can go through it if u need to

Answer 8

Umm, lets do practice problem 1 on ex 3.16

Answer 9

, the angle is 35 deg

Answer 10

So, we would need to find the force of friction

Answer 11

Do you mind if I get back to you tomorrow, I have to leave :/

Answer 12

Thanks for the help though

Answer 13

ok