Projectile Motion – Cliff Problems. Bell Ringer.
Projectile Motion – Cliff Problems
Is there anything pushing on the ball horizontally?
No, only gravity pushes on it. If there is no push, speed doesn’t change!
After 0.5 sec
After 1 sec
Projectile: An object that moves through space acted only upon by the earth’s gravity.
A projectile may start at a given height and move toward the ground in an arc.
A projectile may also start at a given level and move up and then back down.
In projectile problems, you do not need to consider the mass of the object projected. Remember, if you ignore air resistance, all bodies fall at exactly the same rate.
Δdx = vt
To simplify calculations, the initial vertical velocity, vyi, will be left out of all equations in which an object is projected horizontally.
Δdy = (1/2)gt2
In her physics lab, Melanie rolls a 10-g marble down a ramp and off the table with a horizontal velocity of 1.2 m/s. The marble falls in a cup placed 0.51 m from the table’s edge. How high is the table?
D’andre throws a baseball horizontally from 2 meters off of the ground towards home plate which is 10 meters away. How fast should he throw it so that it lands on the plate?
vi = ?
You are horizontally throwing water balloons at your friend from on top of a ladder. If the person is 18 meters from your ladder, and you can throw at 22 m/s, how high up the ladder should you climb?
vi = 22 m/s