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# AQA MM1B - Mechanics 1 -Tuesday 21st June 2016

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1. (Original post by koolgurl14)
did anyone get 80.6 for the ten marker?
Well I got 80.5 which is probably a rounding error on my part but yeah I did

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2. What times did you get when the velocitys were parrallel? I got t=5 and t=25 which I then used in the position vector equation to get 309m between them?
3. I got 80.5 for the last question. Projectile question was awful, and that 4 mark question on the ramp one asking for the angle I didn't understand. What did people get for that? Got 5 degrees or something but it's probably wrong.
4. (Original post by Dukey98)
What times did you get when the velocitys were parrallel? I got t=5 and t=25 which I then used in the position vector equation to get 309m between them?
I got 12s sorry Im stressing now haha because vectors will be parallel when vector a is a multiple of vector b
5. (Original post by RUNSran)
You got t= 5 and t= 25 right? if you sub either of both value to the equation of Va =Vb you wont get the same i or j components
Oooo. I got to that stage but didnt know how to proceed. hopefully get some marks.
6. (Original post by smartsy)
I got around 13
yeah same
7. (Original post by Examguy123)
For the plane wind question you do 240/20 to get 12 ms for the speed of the wind then from there u can work out the resultant velocity
Magic that's what I got ended up using that data for the next questions though, probably got bearing wrong around 007deg
8. (Original post by Hep123)
I got 12s sorry Im stressing now haha because vectors will be parallel when vector a is a multiple of vector b
the multiple will be the time
9. I got 13.2 on the 7 mark proj ans 97.6 on last 10 mark one
10. (Original post by Chickenslayer69)
I got 80.5 for the last question. Projectile question was awful, and that 4 mark question on the ramp one asking for the angle I didn't understand. What did people get for that? Got 5 degrees or something but it's probably wrong.

yeah got 4. something when rounded its 5
11. (Original post by RealistZ)
I got 13.2 on the 7 mark proj ans 97.6 on last 10 mark one
I got the same for the 7 mark but not the 10 mark
12. This paper's got me feeling like
14. How did you do the finding the angle of the ramp question? I did some weird thing where I cancelled mass, (f=ma), probably didn't work.
15. (Original post by Dukey98)
What times did you get when the velocitys were parrallel? I got t=5 and t=25 which I then used in the position vector equation to get 309m between them?
I got same but I didnt know which to use and both values didnt satisfy the equation Va=Vb. i was so confuse
16. (Original post by Hep123)
I got the same for the 7 mark but not the 10 mark
Did you have to subtract the two different values for t?

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17. (Original post by Hep123)
I got the same for the 7 mark but not the 10 mark
What did you get for t in the first question.

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18. I got 14.6 m/s for the 7 marker.

I did Vcos50 × t = previous horizontal length (13. sth + 3) .

it took 1.7 sth seconds to hit the top of the box so I subbed the same time into the equation above to get 14. 6
19. did people get 8 for the bearing?
20. (Original post by RUNSran)
You got t= 5 and t= 25 right? if you sub either of both value to the equation of Va =Vb you wont get the same i or j components. I was really confuse on where to go from there
well i used t=5 because only the i component of the velocity is the same therefore i subbed 5 into the r=ut+1/2at^2 of the A and the r=ut+1/2at^2 + r original of the B then i subtracted the two r from each other to get the distance then i added the square of the i component and the square of the j component and square rooted the answer. Its really hard to explain it without paper and pen I'm not even sure of my answer lol

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