Homework Help: Physics

Posted by Heather on Sunday, August 29, 2010 at 6:28pm.

A sprinter explodes out of the starting block with an acceleration of +2.3 m/s^2, which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity (a) at t=1.2 s ans (b) at the end of the race?

Physics - Henry, Sunday, August 29, 2010 at 8:11pm
a. V = 2.3m/s^2 * 1.2s = 2.76m/s.

b. Since the acceleration dropped to
0 at 1.2 sec, the velocity remained
constant at 2.76m/s.
Physics - Heather, Sunday, August 29, 2010 at 8:33pm
thankyou soo much!!!

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