Projectile Motion and 1D Motion

What counts as a projectile?

Objects that have been launched or thrown

What is significant about the vertical dimension?

It is always (or close to) the gravity constant (±9.81m/s²)

What is significant about the horizontal dimension?

There is usually no acceleration (= 0)

If something is dropped, and another thing is thrown, which will hit the ground first?

They’ll hit the ground at the same time since they are both moving at the gravity constant of 9.81m/s²

T/F the x and y direction are independent of each other

True! Movement in the x direction doesn’t technically have to relate to moving in the y direction

How do you determine velocity given the angle of a projectile?

v_o,x = v₀cos(theta)

v_o,y = v₀sin(theta)

Height of a projectile equation

v_0,y²/2g (can sub v₀ with sin²(theta)

Range of motion equation

v₀²sin(2theta)/g

If the acceleration and velocity have the same direction, what is the object doing?

Speeding up

What consistites as a free-fall?

A fall in which air resistance is negligible

Gravity is the ONLY present force