OCR A AS Maths Mechanics 22nd May 2019 discussion Watch

MrsFredWeasley
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How did you guys find it?
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Fliksty
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challenging but doable.
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chyla
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IMPOSSIBLE, not sure i even filled out 20 marks!
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PhysicsGeek100
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thought it was pretty decent. but messed up the last 5 marker on mechanics.
(Original post by MrsFredWeasley)
How did you guys find it?
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MrsFredWeasley
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yeah I thought it was pretty good too. Unlucky about the 5 marker, did you manage to get the value of a on the 8 marker? I ended up with a cubic but just couldn't get a.
(Original post by PhysicsGeek100)
thought it was pretty decent. but messed up the last 5 marker on mechanics.
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Fliksty
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i got 6.7 for A but it said exact value so it was some fraction with a root
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MrsFredWeasley
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oh, how did you do it? I did the integration and all, then ended up with a cubic in terms of a but couldn't work out how to solve this.
(Original post by Fliksty)
i got 6.7 for A but it said exact value so it was some fraction with a root
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Fliksty
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to be honest, i just put it in my calculator and got 6.7. but in my working, the cubic equation had 3 terms with x in them, so you could factorise x and then solve the quadratic to get a value
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PhysicsGeek100
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(Original post by MrsFredWeasley)
yeah I thought it was pretty good too. Unlucky about the 5 marker, did you manage to get the value of a on the 8 marker? I ended up with a cubic but just couldn't get a.
yeh i got it. i had an epiphany and managed to clock it in the end. the 5 marker is the only thing i messedd up along with the value of k for that trapezium. but for the five marker i was so stupid i ended up with a quadratic and used a positive value of my v instead of a negative one so i got 0.572 and -0.825 instead of the other way round smh.
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Fliksty
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trapezium?
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MrsFredWeasley
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yeah it was the third part of the vector question. you had to find a value of k for which the 4 vectors would make a trapezium
(Original post by Fliksty)
trapezium?
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