Ok, so im having troule with yet another accelerated linear motion question... i got a 40% on my last exam, and i need at least a 90% on this one to keep a decent average... any help is desperately needed and very much appreciated :)(adsbygoogle = window.adsbygoogle || []).push({});

So here it goes:

(A) A particle is projected vertically upwards with velocityum/s and is at a heighthaftert1andt2seconds respectively. Prove that:

t1.t2 = (2h)/g

(B) A car accelerates uniformly from rest to a speedvm/s. It then continues at this constant speed fortseconds and then decelerates uniformly to rest.

The average speed for the journey is (3v)/4

(i) Draw a speed-time graph and hence, or other wise, prove that the time for the journey is 2t seconds.

(ii) If the car driver had observed the speed limit of (1/2)v, find the least time the journey would have taken, assuming the same acceleration and deceleration as in (i).

Arghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!

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# Homework Help: Acc Linear Motion

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