Kinematics Flashcards
What are the 3 kinematics equations
V= Vx0 + AxT
X= X0 + Vx0T + 0.5Ax²
Vx²= Vx0² + 2Ax( X - X0)
What are ways to describe average Velocity
Displacement/ time
(Vx + Vx0)/2
What is the difference between distance and displacement
Displacement is the difference between the start and the end points. Distance is the amount the particle has traveled
What is velocity and acceleration
Velocity- Displacement/time
Acceleration- Velocity/time
What are the equations in the y direction for projectile motion and the x direction for projectile motion
All 3 kinematics equation apply for the y direction
X= Vx0T for the x direction
If a ball is thrown up or as a projectile, at max height what is the Velocity in the y direction
Vy= 0
How would you find the initial velocity of a projectile in the x and y that is launched at an angle, given the initial velocity
Use trigonometry to find the components.
Vx0= V0costheta
Vy0= V0sintheta
How does the velocity in the y change overtime in a projectile problem vs the change in velocity in the x
The velocity in the y is the same magnitude but going up Vy0 is positive and going down Vy is negative
The velocity in the x is constant, Vx0=Vx
If a projectile is horizontally launched, what is Vy0
Vy0 = 0
What is the acceleration of projectiles and objects in free fall vertically and horizontally, why?
Acceleration is always -9.8 m/s² in the y because the earth is in our system
Acceleration is always 0 in the x because in free fall the motion is in the y and in projectile motion the velocity is constant
If velocity is constant, acceleration is
0
What are vectors in kinematics
Displacement, acceleration, velocity
What are scalars in kinematics
Distance, Speed, time
What is speed
distance/time
name all the variables in the y direction for horizontal range projectile problems
Y=0 Yo=0
Vyo= Vosintheta Vy= -Vyo
Ay= -9.8
