1. Projectile Motion 2 Launch Angles (symmetrical trajectories)
Physics 12

2. Comprehension Check
An arrow is launched from a cliff with an initial velocity of 25m/s. If the cliff is 25m high determine:
The time in the air
How far from the base of the cliff it hits
How fast it is going when it hits the ground

3. Projectiles Launched at an Angle
A golfer uses a club that launches a golf ball at a 15° angle at a speed of 45m/s. Determine the following:
The time the golf ball is in the air
The horizontal distance the ball travels
The velocity as it strikes the ground
The maximum height the ball attains

4. Start with the position in the y equation
Include the initial velocity in the y term
Solve for when the position in the y is equal to zero

5. Use the time from the previous question and the position in the x equation
Solve for the range (horizontal distance)

6. Solve for the velocity in the x and y direction

7. Use Pythagorean Theorem and Trig to solve for final velocity

8. Max height will occur when y velocity is equal to zero
Max height will occur when y velocity is equal to zero. Solve for time and then sub into y position equation

9. Practice Problems
Page 536
Questions 1-8
Page 549
Questions 13-14