course PHY 121
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.
###10cm/s is v0
###20cm/s is vf
###45cm is a
answer/question/discussion:
• 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.
###10cm/s^2 is ‘dv.
###3s is’dt
###50cm/s is ‘ds
answer/question/discussion:
• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
###30cm is vf
###20 cm/s^2 is ‘dv
answer/question/discussion:
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
Yes
###No for the 2nd and 3rd situation.
answer/question/discussion:
• Is it possible to directly determine `dv?
No
###Yes for the 1st and 2nd one.
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You aren't identifying these quantities correctly.
Before you do anything else so submit a copy of this posting and your answers to the following questions. Also email me so I can get back to you on this as quickly as possible:
What are some possible units of position?
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What does `ds stand for?
What therefore are some possible units of `ds?
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What is the definition of velocity?
What therefore are some possible units of velocity?
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What is the definition of acceleration?
What therefore are some possible units of acceleration?
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Does `ds stand for change in position, change in velocity, change in clock time or change in acceleration?
Which quantities in your submission here identify `ds as a quantity which doesn't have the units of `ds?
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Does `dts stand for change in position, change in velocity, change in clock time or change in acceleration?
Which quantities in your submission here identify `dt as a quantity which doesn't have the units of `dt?
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Does v0 stand for a position, a velocity, a clock time or an acceleration?
Which quantities in your submission here identify v0 as a quantity which doesn't have the units of v0?
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Does vf stand for a position, a velocity, a clock time or an acceleration?
Which quantities in your submission here identify vf as a quantity which doesn't have the units of vf?
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Does a stand for a position, a velocity, a clock time oran acceleration?
Which quantities in your submission here identify a as a quantity which doesn't have the units of a?