Querry 1

course Phy201

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Physics I

09-18-2006

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15:55:34

Briefly state what you think velocity is and how you think it is an example of a rate.

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RESPONSE -->

velocity is just one type or rate velocity deals with distance and tme

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15:55:49

** A rate is a change in something divided by a change in something else.

This question concerns velocity, which is the rate of change of position: change in position divided by change in clock time. **

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RESPONSE -->

yes

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15:57:23

Given average speed and time interval how do you find distance moved?

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RESPONSE -->

the average speed * by the time will give you distance

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15:57:48

** You multiply average speed * time interval to find distance moved.

For example, 50 miles / hour * 3 hours = 150 miles. **

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RESPONSE -->

yes

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15:59:16

Given average speed and distance moved how do you find the corresponding time interval?

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RESPONSE -->

If you take the average speed and / it by the distance then you will get the tome interval

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16:01:10

** time interval = distance / average speed. For example if we travel 100 miles at 50 mph it takes 2 hours--we divide the distance by the speed.

In symbols, if `ds = vAve * `dt then `dt = `ds/vAve.

Also note that (cm/s ) / s = cm/s^2, not sec, whereas cm / (cm/s) = cm * s / cm = s, as appropriate in a calculation of `dt. **

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RESPONSE -->

yes I got that backwards I think when I see the units with it I will work the math right

The units will certainly help. Also be careful with the algebra.

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16:04:48

Given time interval and distance moved how do you get average speed?

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RESPONSE -->

You would take the change in distance / by the change in and time and is will be the average speed

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Good. Let me know if you have questions.