Find the speed of the particle after 0.2 seconds

AI Thread Summary
The particle is thrown horizontally at a speed of 10 m/s from a height. After 0.2 seconds, the vertical speed (vy) is calculated as 2 m/s using the equation vy = gt, with g approximated as 10 m/s². The total speed (v) is then determined using the Pythagorean theorem, resulting in approximately 10.198 m/s. It is noted that using 9.8 m/s² for gravity would yield a slightly different result. The calculations confirm the particle's speed after 0.2 seconds.
annalian
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Homework Statement


The particle is thrown horizontally with speed 10 m/S (I believe from a height). Find the speed of it after 0.2 seconds.

Homework Equations


vx=v
vy=gt
v=sqrt(vx^2+vy^2)[/B]

The Attempt at a Solution


vx=10
vy=10*0.2=2
v=sqrt(100+4)=10.198m/S Am i right?
 
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Looks right to me. I think it is probably more common to use 9.8 ms-2 for gravity though.
 

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