mechanics
A car passes three posts P, Q and R, on a straight horizontal road. The distance PQ = 50m. The distance QR = 100m. The car, moving with constant acceleration, takes 2 seconds to travel from P to Q and 3
seconds to travel from Q to R.
(a) the acceleration of the car,
seconds to travel from Q to R.
(a) the acceleration of the car,
Have you tried anything so far?
A car passes three posts P, Q and R, on a straight horizontal road. The distance PQ = 50m. The distance QR = 100m. The car, moving with constant acceleration, takes 2 seconds to travel from P to Q and 3
seconds to travel from Q to R.
(a) the acceleration of the car
seconds to travel from Q to R.
(a) the acceleration of the car
It might be helpful if you translate the paragraph of info into maths.
So in this case, let's say everything with subscript 1 refers to the journey PQ, while subscript 2 refers to the journey QR.
What is u_1? v_1? s_1? u_2? etc.. You might end up having a lot of blanks (for instance, u_1 is unknown here), but it gives you clues as to what the missing pieces are before maybe formulating a plan of attack.
Please show your work/thoughts, per discussion board rules.
P.S. If I'm counting correctly, you should have 10 quantities that you (a) have information about; or (b) not know, but will be the same as some other quantity; or (c) not know, and you really want to find; or (d) not know, but irrelevant.
Which quantity falls in which category? Well, depends on how much you've worked on, really. That's problem-solving! Also 10 isn't really that many.
P.P.S. Usually a nice diagram helps consolidate info. It works for me and many, many, many people, at least.
So in this case, let's say everything with subscript 1 refers to the journey PQ, while subscript 2 refers to the journey QR.
What is u_1? v_1? s_1? u_2? etc.. You might end up having a lot of blanks (for instance, u_1 is unknown here), but it gives you clues as to what the missing pieces are before maybe formulating a plan of attack.
Please show your work/thoughts, per discussion board rules.
P.S. If I'm counting correctly, you should have 10 quantities that you (a) have information about; or (b) not know, but will be the same as some other quantity; or (c) not know, and you really want to find; or (d) not know, but irrelevant.
Which quantity falls in which category? Well, depends on how much you've worked on, really. That's problem-solving! Also 10 isn't really that many.
P.P.S. Usually a nice diagram helps consolidate info. It works for me and many, many, many people, at least.
(edited 10 months ago)
Original post by yellowleaf23
Have you tried anything so far?
Please note this is a duplicate post - more advice has been given in the other thread
Original post by mathewjames22
A car passes three posts P, Q and R, on a straight horizontal road. The distance PQ = 50m. The distance QR = 100m. The car, moving with constant acceleration, takes 2 seconds to travel from P to Q and 3
seconds to travel from Q to R.
(a) the acceleration of the car,
seconds to travel from Q to R.
(a) the acceleration of the car,
There are a few similar questions in TSR.
One of them is this which provides more hint(s).
https://www.thestudentroom.co.uk/showthread.php?t=2521891
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