Kinematics in 1d question- very hard
Here is the question:
A cyclist starts from rest and accelerates at for 10 seconds along a straight horizontal road and then continues at a constant speed. A motorist sets off from the same point as the cyclist at the same time and accelerates at a constant rate for 8 seconds, reaching a maximum speed of . The car then decelerates at a constant rate until it comes to rest after a further 15 seconds. At the instant when the car comes to rest, it is overtaken by the cycle.
A) Calculate the greatest speed attained by the cyclist
B) Sketch a speed-time graph showing the motions of both the cyclist and the motorist
C) Calculate the total distanceb travelled by the cyclist before overtaking the car.
D) Calculate the value of V
That is the question.
Now, I can do parts A and C.
I can also do half of part B, as I dont know the value of V I cannot draw the car's motion accurately, however I know the general shape!
I am having a problem with part D- calculating the value of V. I think that it is ; however I am unsure
Would anyone be able to clarify with me how this question is done?
Can anyone advise me on sequences, nth terms etc?
I forgot I posted this until I saw my email :)
I solved this in a different way, and split the car's graph into 2 parts, for acceleration and deceleration.
I then found out what each graph held in terms of V e.g. 1/2 * V * 8 etc
then got 11.5v and divided 288 by 11.5 to get 25.04
thanks for your time though