Mechanics question (pls help)
http://filestore.aqa.org.uk/subjects/AQA-PHYA2-QP-JUN14.PDF
Can someone please explain how you approach question 1 (c) (ii)?
Can someone please explain how you approach question 1 (c) (ii)?
Original post by jessyjellytot14
http://filestore.aqa.org.uk/subjects/AQA-PHYA2-QP-JUN14.PDF
Can someone please explain how you approach question 1 (c) (ii)?
Can someone please explain how you approach question 1 (c) (ii)?
What have you done so far?
Original post by TheFarmerLad
What have you done so far?
Nothing because I don't know which equation to use. I have answered the previous parts.
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
Original post by TheFarmerLad
Think of the energy transfers taking place during the rollercoaster
Ek= 1/2mv2 ?
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/
Original post by TheFarmerLad
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?
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
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