Module 4: Motion in Two Dimensions Flashcards
What is the shape of the path of a projectile fired or thrown near the surface of the earth?
When a projectile is fired or thrown near the surface of the earth, its path is parabolic
What will never change once an object has been launched?
The x-component of the projectile’s velocity will never change once it has been launched.
What happens to the object in the y-dimension once it has been launched?
The y-component of the velocity will be affected by gravity, so it will decrease until it reaches zero, at which point it will get more and more negative.
When will an object reach its maximum height?
A projectile’s maximum height will be reached when the y-component of its velocity is zero.
If the projectile lands at the height from which it was launched, it will reach its maximum height at the midpoint of the journey
What will be the final value of Vy?
The final value of Vy will be the negative of the initial value of Vy… which means its final speed will be the same as its initial speed.
What is equation 4.9, the range equation?
Range = Vo^2 * sin( 2 * θ ) / g
What are the requirements to use equation 4.9?
- Gravitation acceleration is always positive
- It applies only to projectiles that land at the same height from which they are launched.
Define Parabolic motion.
Motion that occurs when an object moves in two dimensions but has zero acceleration in one of this dimensions and a constant, non-zero acceleration in the other.
What’s the other equation we need to know in this module?
Δx = vo* t + 1/2 * a * t^2
What’s the last equation you need to know?
V^2 = Vo^2 + 2a * Δx
What is equation 2.6?
V = Vo +at
