Projectile Motion 1/27/14
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What is Range in projectile motions?
The total horizontal displacement aka dh
What is a projectile?
Any object that.. • experiences only the force of gravity • does not propel itself in any way • moves horizontally and vertically • is in free fall • and follows a parabolic path
What is height in projectile motion?
The maximum vertical displacement which occurs halfway through the flight
What is hang time in projectile motion?
Total time from launch to landing
What is horizontal motion in projectile motion?
Constant speed
What is vertical motion in projectile motion?
Acceleration (due to gravity)
How do you find the vh?
Vh = vi(cos)pheta
How do you find the vvi?
vvi= vi(sin)pheta
In horizontal motion, how do you find the horizontal distance?
Horizontal distamce = the vertical height • time
In vertical motion, how do you find the vertical distance?
Vvi•t + 1/2•acceleration•time squared
In vertical motion, how do you find the final velocity?
Vvi + acceleration• time = Vvf
How do you find the final velocity squared?
Vsquaredvf = Vsquaredvi + 2(acceleration •vertical distance)
How do you find the horizontal velocity?
Vh= Vi cos thetha
How do you find the initial bertical velocity aka vvi?
Vvi= Vi sin theta
In a right triangle what is the initial velocity? Aka Vi
The hypotenuse
In a right triangle what is Vvi aka initial vertical velocity?
The opposite
In a right triangle what is the horizontal velocity?
The adjacent
What is the vertical velocity at the zenith?
Zero
What is the value of acceleration?
-9.8 m/s squared
What should you do when you are being asked for the maximum height of the projectile?
Only consider half the flight
What does newtons 1st law state?
Objects at rest will stay at rest or move at a constant speed in a straight line unless acted on by an unbalanced force
What are balanced forces?
Forces acting on an object in opposite directions which add up to zero
What does newtons 2nd law state?
That the sum of forces in an object are congruent to its mass times its acceleration; f= ma
Define mass
The amount of matter in an object no matter the gravity