assignment3problem

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course Phy 231

2-3-11 about 12:00am

What are the average acceleration and final velocity of an object which accelerates uniformly from rest, attaining a velocity of 40 cm/sec in 13.6 seconds? How far does the object travel during the 13.6 seconds?

aAve= (40cm/sec – 0)/(13.6sec – 0)= 2.94cm/sec/sec

vAve= (40cm/sec + 0)/2= 20cm/sec

ds= 20cm/sec * 13.6sec= 272cm

v_f= 2 * 20cm/sec= 40cm/sec

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