2. Projectile Motion Properties
Motion subject only to the force of gravity
Properties
Horizontal motion is independent of the vertical motion.
x vs. t is linear, y vs. t is quadratic (parabolic)
y vs. x is always parabolic

3. Projectile motion is always some part of a parabola
Projectile motion displays symmetry between left and right sides

4. The angle between the initial velocity vector and the positive x-axis
“Launch angle”
The angle between the initial velocity vector and the positive x-axis
General launch angle Zero launch angle

5. General Equations of Motion

6. General Equations of Motion
Zero Launch Angle Equations of Motion
(origin at the launch point)

7. Zero Launch Angle
Example 2: A person skateboarding with constant speed 1.30 m/s releases a ball from a height of 1.25 m above the ground. Find…
x and y for t = s.

8. Zero Launch Angle
Example 2: A person skateboarding with constant speed 1.30 m/s releases a ball from a height of 1.25 m above the ground. Find…
x and y for t = s.
x and y for t = s.

9. Zero Launch Angle
Example 2: A person skateboarding with constant speed 1.30 m/s releases a ball from a height of 1.25 m above the ground. Find…
x and y for t = s.
x and y for t = s.
the velocity, speed, and direction of motion of the ball at t = s.

11. Example: A mountain climber encounters a crevasse in an ice field
Example: A mountain climber encounters a crevasse in an ice field. The opposite side of the crevasse is 2.74 m lower, and is separated horizontally by a distance of 4.10 m. To cross the crevasse, the climber gets a running start and jumps in the horizontal direction.
(a) What is the minimum speed needed by the climber to safely cross the crevasse?

12. Example: A mountain climber encounters a crevasse in an ice field
Example: A mountain climber encounters a crevasse in an ice field. The opposite side of the crevasse is 2.74 m lower, and is separated horizontally by a distance of 4.10 m. To cross the crevasse, the climber gets a running start and jumps in the horizontal direction.
(a) What is the minimum speed needed by the climber to safely cross the crevasse?
(b) If, instead, the climber’s speed is 6.00 m/s, where does the climber land?