cq_1_061

Phy 201

Your 'cq_1_06.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

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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.

answer/question/discussion: ->->->->->->->->->->->-> :

v0 = 10 cm/s

vf = 20 cm/s

`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.

answer/question/discussion: ->->->->->->->->->->->-> :

a = 10 cm/s^2

`dt = 3 s

vf = 50 cm/s

#$&*

• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.

answer/question/discussion: ->->->->->->->->->->->-> :

`ds = 30 cm

v0 = 0 cm/s

a = 20 cm/s^2

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Then for each situation answer the following:

• Is it possible from this information to directly determine vAve?

answer/question/discussion: ->->->->->->->->->->->-> :

Situation 1 – yes = (vf + v0)/2

Situation 2 – no

Situation 2 - no

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• Is it possible to directly determine `dv?

answer/question/discussion: ->->->->->->->->->->->-> :

Situation 1 – yes = vf – v0

Situation 2 – yes = a * `dt

Situation 3 - no

#$&*

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5 minutes

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