I will give a few questions that I need help with.
A car is initially travelling with a constant velocity of 15 ms-1 for T s. It then decelerates at a constant rate of T/2 s , reaching a velocity of 10 ms-1. It then immediately accelerates at a constant rate of 3T/2 s, reaching a velocity of 20 ms-1.
a) sketch a velocity time graph to illustrate motion (DONE)
*b) given that the car travels a total distance of 112,5 m over the journey described, find the value of T.*
I'm not sure if my answer is correct. I initially got 9.72, but I'm not certain. I think something went wrong; tried to fix the problem but got flustered.
2. A racing car starts from rest at the point A, and moves with constant acceleration of 11ms-2 for 8 seconds. The velocity it has reached after 8 s is then maintained for T s. The racing car then decelerates from this velocity to 40 ms-1, in a further 2 s , reaching point B.
A) sketch a velocity-time graph (done)
*b) Given that the distance between A and B is 1404 m , find the value of T.*
3. A cyclist is descending down a mountain with constant acceleration. She passes through three checkpoinnts, P, Q and R, with velocity 6 ms-1, x ms-1 and 20 ms-1 respectively. Time taken to trvel from P to R = 35 s.
A) Find acceleration
I got the acceleration to equal 0.4 ms-2, I'm sure but does anyone mind to confirm this, if wrong, please explain.
Given that t1/t2 = 4/3 , where t1 is time taken to travel from P to Q and t2 is the time taken to travel from Q-R,
*b) find the value of x*
I didn't understand this, I need a lot of help on this one
c) Find the distance between P and R. I can do this one, but it's one of these continuous questions and I don't want an ecf.
Please help me, with the questions requested, Thank you so much!!!!!! I really appreciate it.