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November, 2024

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Physics Helpp

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SierraMist
Posts: 116 - Karma: 13
Does anyone know how to solve this problem??


A 3kg object is accelerated from rest to a speed of 44 m/s in 67s
What average force was exerted on the object during this period of acceleration?
Nov 2 2008 11:30AM
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user098123
Posts: 6072 - Karma: 18
Calculate the acceleration. That's your velocity over your time. That will give you a m/s/s.

Then use F=mass * acceleration. Plug in the acceleration you just used and multiply it by your mass. Your Force will be in Newtons.
Nov 2 2008 11:33AM
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C-Burg
Posts: 4729 - Karma: 130
F=ma,
a=dv/dt=(44m/s-0m/s)/67m/s=.657m/s^2
m=3kg
F=3kg*.657m/s^2=1.97 N

does that help
Nov 2 2008 11:34AM
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SierraMist
Posts: 116 - Karma: 13
thanks guys that helped alot :) :)
Nov 2 2008 12:01PM
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spliff.Life
Posts: 7847 - Karma: 1,549
physics is hard, derivations suck, but i like it
Nov 2 2008 12:13PM
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Bepo
Posts: 8195 - Karma: 17
I suggest you drop the class right now if you need help with that.
Nov 2 2008 12:27PM
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