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Mathematics, 11.03.2021 01:00 kaitlynpaigge
A particle accelerates uniformly from 7 ms-1 to 21 ms-1 in 8 s.
How far does it travel in this time?
(b) Lewis is travelling in a car along a straight road. He wonders whether the car is accelerating uniformly.
Lewis estimates that the car takes
5 s to travel a distance of 75 m from A to B, 15 s to travel a distance of 315 m from A to C.
Lewis models the acceleration as a constant a ms-2. He also takes the
speed of the car at A to be u ms-1, as shown in the diagram above.
(i) By considering the motion from A to B, show that
75 = 5u + 12.5a
(ii) Find a second equation involving u and a.
(iii) Hence find the value of u and show that a = 1.2
Thank you very much in advance if you take the time to help me out!
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Answers: 2
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A particle accelerates uniformly from 7 ms-1 to 21 ms-1 in 8 s.
How far does it travel in this time...
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