All Questions
4
questions
-1
votes
2
answers
67
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Why does the property of a projectile is different from a parabola (with the opening downward) represented by a quadratic equation?
The property of a projectile make me think about those sine and cosine graphs I had learned in trigonometry class, which the distance between every two points on that parabola is the same but the ...
- 37
0
votes
3
answers
35k
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When does acceleration due to gravity equal positive/negative? [closed]
For example a projectile is launched at an angle. What would $a$ in $y=vt +.5at^2$ be?
Let's say I choose up to be positive. How do you not confuse yourself whether to use positive or negative $a$?
- 13
2
votes
5
answers
11k
views
How to get the angle needed for a projectile to pass through a given point for trajectory plotting [closed]
I am trying to find the angle needed for a projectile to pass-through a given point.
Here is what I do know:
Starting Point $(x_0,y_0)$
Velocity
Pass-through point $(x_1, y_1)$
I also need to ...
- 121
3
votes
2
answers
6k
views
The trajectory of a projectile launched from a hilltop
Here is the problem:
A boy stands at the peak of a hill which slopes downward uniformly at angle $\phi$. At what angle $\theta$ from the horizontal should he throw a rock so that it has the greatest ...
- 341