Projectile Motion

scalar

size or quantity, strength without a direction. ex. 55 mph

Vertical motion of a projectile

1. Force = Weight (the pull of gravity acting on the object) 2. Acceleration = -9.8 m/s/s 3. Velocity changes 9.8 m/s per second

Horizontal motion of a projectile

1. Force = none 2. Acceleration = none 3. Velocity is constant

Examples of projectiles

1. an object dropped from rest 2. an object thrown vertically upwards 3. an object thrown upward at an angle

Independent Components

Horizontal and vertical components of a projectile have NOTHING to do with each other.

Parabola

Shape of a projectile's path.

SOHCAHTOA

Sin A= Opposite/Hypotenuse Cos A = Adjacent/Hypotenuse Tan A = Opposite/Adjacent

In the absence of gravity and air, what happens to a cannon ball after it leaves the cannon?

Straight line motion in the same speed and direction.

Range

The horizontal distance traveled by a projectile.

Gravity

The only force acting on a projectile.

Trajectory

The parabolic path that a projectile follows

Magnitude

The size or amount of something.

Horizontal

Traveling across the X-axis

Vertical

Traveling along the Y-axis

Vector

Units that have both magnitude (strength) and direction. Ex. 20 N (North)

Projectile

a moving object with the only force acting upon it is gravity

Horizontal motion

has constant velocity..

Vertical motion

is accelerated

Component

one of two vectors, usually at right angles, whose sum is the resultant.

resultant

the vector sum of two or more component vectors