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For each situation state which of the five quantities v0, vf, `ds, `dt and a are given, and give the value of each.
A ball accelerates uniformly from 10 cm/s to 20 cm/s while traveling 45 cm.
o V0= 10 cm/s
o Vf = 20 cm/s
o `ds = 45 cm
A ball accelerates uniformly at 10 cm/s^2 for 3 seconds, and at the end of this interval is moving at 50 cm/s.
o A = 10 cm/s^2
o `dt = 3 sec
o Vf = 50 cm/s
A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
o A = 20 cm/s^2
o Vf = 30 cm
o V0 = 0
Then for each situation answer the following:
Is it possible from this information to directly determine vAve?
o It is possible to directly determine vAve for situation 1 and 3 because we have both initial and final velocity. Therefore, we just add the two numbers and divide by 2. However, you cant solve it directly in situation 2 without the initial velocity.
Is it possible to directly determine `dv?
o The same answer applies to this question as in the previous question. However, to solve for initial velocity in situation 2 you would take the equation `dv = aAve * `dt and solve for v0. (`dv = vf v0)
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20 min
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