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course phy 201
rand ass3#$&*
course phy 201
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 = 294cm/s/s (40/13.6)
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40 / 13.6 indicates the right calculation, though units should be included on both of those quantities.
The units of the calculation would be cm/s/s or cm/s^2.
However it should be obvious that 40 / 13.6 isn't 294.
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aAve = 40cm/s / 13s = 2.94cm/s/s
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final velocity = 40cm/s
40 x 13.6 = 544cm
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If the object traveled at a constnat 40 cm/s for 13.6 s, this is how far it would go.
However the object doesn't reach 40 cm/s until the very last instant, so it doesn't go that far.
How far does it go?
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Displacement is not in general equal to final velocity * change in clock time.
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