Solving projectile motion equations

  • #1
Femme_physics
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  • #2
ZapperZ
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Er... "s" is not an unknown. It is a unit for "seconds".

Zz.
 
  • #3
Femme_physics
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Okay, but why is it in second degree? Why did they need to add ^2 into a unit?
 
  • #4
ZapperZ
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Okay, but why is it in second degree? Why did they need to add ^2 into a unit?

Er.. it seems that you appear to not know that units can be squared, or undergo the same operations as a variable.

An acceleration, for example, is [itex]L/T^2[/itex], where L is length, T is time. So since the time dimension is squared, the units is also squared. In SI units, it is [itex]m/s^2[/itex]. If you don't like the square symbol, then write it as [itex]m/ss[/itex]. There, no more squared.

Zz.
 
  • #5
jtbell
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If you don't like the square symbol, then write it as [itex]m/ss[/itex].

Or as (m/s)/s: (meters per second) per second.
 
  • #6
Femme_physics
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Ah...a little deeper ponderage after your replies got me to see the logic :) mercy.
 

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