# M1 mechanics resolving forces

Watch this thread
Announcements
Thread starter 1 month ago
#1

My question is regarding how we do this

The answer sheet shows that I have to use cosine rule and draw a triangle to find this even tho the question does not specify a method.

The method I know is finding the x-components and y-components for each forces shown in the question and using pythagorus theorem to get the magnitude. Then using Tan theta =y/x to find the angle
I tried doing that and got the same answer as in the answer sheet

Do I really have to do the method shown in the answer sheet? Or is it an alternative option. I would not prefer if I lose marks for using the method I know so would like to know this. The textbook does not specify anything either regarding this

I am doing the exam privately btw so I cant really ask any teacher as I am self studying

Examboard is Edexcel A level Mechanics
Last edited by Goldenknight; 1 month ago
0
reply
1 month ago
#2
(Original post by Goldenknight)

My question is regarding how we do this

The answer sheet shows that I have to use cosine rule and draw a triangle to find this even tho the question does not specify a method.

The method I know is finding the x-components and y-components for each forces shown in the question and using pythagorus theorem to get the magnitude. Then using Tan x =Sin/Cos to find the angle

Do I really have to do the method shown in the answer sheet? Or is it an alternative option. I would not prefer if I lose marks for using the method I know so would like to know this

I am doing the exam privately btw so I cant really ask any teacher as I am self studying

Examboard is Edexcel A level Mechanics
Yes, you can find the x and y components and then just construct a right angled triangle.

You will never lose marks if you get the right answer using a valid method.
1
reply
Thread starter 1 month ago
#3
(Original post by Jpw1097)
Yes, you can find the x and y components and then just construct a right angled triangle.

You will never lose marks if you get the right answer using a valid method.
Ahh okay thats great to know. Thanks!
0
reply
X

Write a reply...
Reply
new posts
Back
to top
Latest

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### Poll

Join the discussion

#### How are you feeling about your SQA results?

They're better than I expected (20)
32.79%
They're what I expected (19)
31.15%
They're worse than what I expected (22)
36.07%

View All
Latest

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?