Original post by Frokeii

How did you guys find it?

Forgot the cosine rule

Original post by Bobbio

Forgot the cosine rule

I accidently multiplied by the angle itself instead of the sin for the sheep question😭 so I'm cooked

mechanics section was good though

Original post by Frokeii

I accidently multiplied by the angle itself instead of the sin for the sheep question😭 so I'm cooked

mechanics section was good though

mechanics section was good though

For the last question in mechanics I actually didn`t know what to do. Like I can see where the 1/11g can come from but I couldn`t find an answer. Tried like F=ma. W=mg, suvat and nothing worked. Would`ve been such a nice paper without this question though

Original post by Bobbio

For the last question in mechanics I actually didn`t know what to do. Like I can see where the 1/11g can come from but I couldn`t find an answer. Tried like F=ma. W=mg, suvat and nothing worked. Would`ve been such a nice paper without this question though

what was the question again ? i can't remember

Original post by Frokeii

what was the question again ? i can't remember

Question 19. Pulley with 2 weights, one is 0.6kg another 0.5kg. Show that a=1/11 times g. Smth like that

Original post by Bobbio

Question 19. Pulley with 2 weights, one is 0.6kg another 0.5kg. Show that a=1/11 times g. Smth like that

ohhh okay, I'll explain it

so you know that N had mass of 0.5kg and M had mass 0.6kg, and they were attached by a light, inextensable rope. It told you that they moved with acceleration, a, when they were let go from rest, and since M had a greater mass of 0.6kg, that one would move down meaning N moves up.

This let's you form 2 equations of F = ma.

Since the string is light and inextensable, the tension is constant throughout meaning both masses experience the same tension

So Since M moved down, (resultant force works with weight), it's equation Is 0.6g - T = 0.6a

Since M moved up (weight is opposing it), then it's equation is T -0.5g = 0.5a

You add these together to cancel out tension, getting you 0.1g = 1.1a. Divide by 1.1 so you get a on it's own, 0.1g/1.1 = 1g/11

Original post by Frokeii

ohhh okay, I'll explain it

so you know that N had mass of 0.5kg and M had mass 0.6kg, and they were attached by a light, inextensable rope. It told you that they moved with acceleration, a, when they were let go from rest, and since M had a greater mass of 0.6kg, that one would move down meaning N moves up.

This let's you form 2 equations of F = ma.

Since the string is light and inextensable, the tension is constant throughout meaning both masses experience the same tension

So Since M moved down, (resultant force works with weight), it's equation Is 0.6g - T = 0.6a

Since M moved up (weight is opposing it), then it's equation is T -0.5g = 0.5a

You add these together to cancel out tension, getting you 0.1g = 1.1a. Divide by 1.1 so you get a on it's own, 0.1g/1.1 = 1g/11

so you know that N had mass of 0.5kg and M had mass 0.6kg, and they were attached by a light, inextensable rope. It told you that they moved with acceleration, a, when they were let go from rest, and since M had a greater mass of 0.6kg, that one would move down meaning N moves up.

This let's you form 2 equations of F = ma.

Since the string is light and inextensable, the tension is constant throughout meaning both masses experience the same tension

So Since M moved down, (resultant force works with weight), it's equation Is 0.6g - T = 0.6a

Since M moved up (weight is opposing it), then it's equation is T -0.5g = 0.5a

You add these together to cancel out tension, getting you 0.1g = 1.1a. Divide by 1.1 so you get a on it's own, 0.1g/1.1 = 1g/11

Thank you,that is very helpful. I have lost some marks on this but I hope I will come back better at paper 2.

Original post by Frokeii

How did you guys find it?

Original post by olygilly

I found really hard

don't worry bro there's always paper 2

Original post by Frokeii

don't worry bro there's always paper 2

https://vm.tiktok.com/ZGeX8yDqu/

this guy went through the paper

this guy went through the paper

Original post by Frokeii

https://vm.tiktok.com/ZGeX8yDqu/

this guy went through the paper

this guy went through the paper

Original post by Frokeii

How did you guys find it?

Had it for my "yr 12 mocks" I think it was a decent paper. The mechanics was my strength, some of the pure was a bit obnoxious. But overall a decent paper

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