# Mechanics question (pls help)

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#1
http://filestore.aqa.org.uk/subjects...2-QP-JUN14.PDF

Can someone please explain how you approach question 1 (c) (ii)?
0
3 years ago
#2
(Original post by jessyjellytot14)
http://filestore.aqa.org.uk/subjects...2-QP-JUN14.PDF

Can someone please explain how you approach question 1 (c) (ii)?
What have you done so far?
0
#3
What have you done so far?
Nothing because I don't know which equation to use. I have answered the previous parts.
0
3 years ago
#4
(Original post by jessyjellytot14)
Nothing because I don't know which equation to use. I have answered the previous parts.
Think of the energy transfers taking place during the rollercoaster
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#5
Think of the energy transfers taking place during the rollercoaster
Ek= 1/2mv2 ?
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3 years ago
#6
(Original post by jessyjellytot14)
Ek= 1/2mv2 ?
And GPE? As the car drops 87% of the energy it has at the top gets converted to KE/
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#7
And GPE? As the car drops 87% of the energy it has at the top gets converted to KE/
So would you work out GPE using GPE=mgh and then multiply this by 0.87 and then sub into the KE equation and solve for V?
0
3 years ago
#8
(Original post by jessyjellytot14)
So would you work out GPE using GPE=mgh and then multiply this by 0.87 and then sub into the KE equation and solve for V?
Yes
1
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