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Solving for the angle of vectors...Intro Physics?
A soccer ball is kicked with an initial speed of 10.3 m/s in a direction 25.7° above the horizontal.
1. Calculate the magnitude of its velocity 0.360 s after being kicked.
I got 9.33 m/s...this is correct
2. What was its direction?
I am not sure how to solve for direction
3. Calculate the magnitude of its velocity 0.720 s after being kicked.
9.64 m/s is correct
4. What was its angle relative to the horizontal (choose positive for above and negative for below)?
Not sure how to solve for this angle :(
1 Answer
- WoodsmanLv 78 years agoFavorite Answer
2. In order to get the mag right, you must have had the correct Vx and Vy components. The direction is given by
Θ = arctan(Vy / Vx).
4. Exact same. This relationship is always true; it's a good idea to be familiar with it.
(BTW: "arctan" means "inverse tan" which is tan^(-1)Θ
