My hw problems looks like this:(adsbygoogle = window.adsbygoogle || []).push({});

The acceleration of a particle is directly proportional to the square of the time t. When t=0, the particle is at x=36 ft. Knowing that at t=9 s, x=144 ft. and v=27 ft/s, express x and v in terms of t.

I'm not exactly sure what directly proportional means. Can someone help me out?

Also I have another question I'm stuck on:

The acceleration of a particle is defined by the relation a= 12x-28, where a and x are expressed in m/s2 and meters, respectively. Knowing that v=8 m/s when x=0, determine (a) the maximum value of x, (b) the velocity when the particle has traveled a total distance of 3m.

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# Homework Help: Dynamics Question

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