Tom and Jill are both robots that are going to have a race. Both start from rest. Tom has a constant acceleration for the entire run, while Jill does the following; first she accelerated for a time of 2.00 minutes(convert to seconds) at a rate of 2.20cm/s/s ( must convert to meters), then runs a distance of 18.9 kilometers reaching a final velocity of 23.7 m/s, thetn decelerates at a rate of 2.3m/s/s, finishing the race with a velocity of 6.00m/s.
If Tom ties with Jill, what would have to be his final velocity?
1
Expert's answer
2011-10-18T13:01:56-0400
a- acceleration of Tom
a1=0.022m/sec^2-accel. Of Jill
1)velocity after two min of Jill =120*0.022=2.64m/sec
S=at^2/2=158m
2)distance of 18.9 kilometers reaching a final velocity of 23.7 m/s
s=& so a=2*18900/
at=23.7 m/s-2.64m/sec=21.06
s=& =t21.06/2
t=18900/10.53=1795sec
a=1.17m/sec^2 {at the distance of 18.9 kilometers reaching a final velocity of 23.7 m/s}
S=18900m
3) , thetn decelerates at a rate of 2.3m/s/s, finishing the race with a velocity of 6.00m/s
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