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September 30, 2025, 08:15:44 pm
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Author Topic: Clarification  (Read 648 times)  Share 

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darkphoenix

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Clarification
« on: October 25, 2010, 11:44:00 pm »
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Quick question:

How do we know when to take upwards as postive or downwards as postive.

For example when dropping an object from a hot air balloon.
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Martoman

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Re: Clarification
« Reply #1 on: October 25, 2010, 11:55:51 pm »
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You choose. Just stick with it.
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itolduso

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Re: Clarification
« Reply #2 on: October 26, 2010, 07:07:25 am »
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In straight line motion, if the direction of acceleration is negative, is it always a deceleration motion?
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Martoman

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Re: Clarification
« Reply #3 on: October 26, 2010, 06:02:15 pm »
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Only if you take it to be. Retardation assumes the opposite direction is the direction of motion.
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2009: Math methods: 50, Psychology: 44
2010: chem 47, further 48, Spesh 49 fml seriously and other yr 11 subs.
2011: Holidaying, screw school.
No. Not azn.
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