Lesson 5: Projectile Motion
Overview:
After the water leaves the pipes in this fountain, the only forces acting on the water are gravity and air friction.
A tourist visiting, would probably stand and admire the beauty of the fountain shown in the photograph, and might even toss a coin into the fountain and make a wish. A physics student, however, might admire the symmetry of the water jets. He or she might estimate the highest point that the water reaches and the angle at which it leaves the fountain, and then mentally calculate the initial velocity the water must have in order to reach that height. This lesson will help you analyze projectile motion and solve related problems. 
Curriculum Expectations:
Specific Expectations:
B2.1 Use appropriate terminology related to dynamics, including, but not limited to: inertial and noninertial frames of reference, components, centripetal, period, frequency, static friction, and kinetic friction.
B2.2 Solve problems related to motion, including projectile and relative motion, by adding and subtracting twodimensional vector quantities, using vector diagrams, vector components, and algebraic methods.
B2.1 Use appropriate terminology related to dynamics, including, but not limited to: inertial and noninertial frames of reference, components, centripetal, period, frequency, static friction, and kinetic friction.
B2.2 Solve problems related to motion, including projectile and relative motion, by adding and subtracting twodimensional vector quantities, using vector diagrams, vector components, and algebraic methods.
Success Criteria:
 What is a projectile?
 What does the range of a projectile measure?
 Describe the properties about the motion of a projectile.
 For an object in projectile motion in two dimensions, are the horizontal and vertical components completely independent of each other?
 Show how to resolve the initial velocity vector into components.
 Derive the range equation of a projectile.
 What is the restriction for applying the range equation in problem solving?
 At what angle does the largest range of a projectile occur?
 What do we assume about air resistance when solving projectile motion problems?
Time Allocation: 2 hours
Learning A
ctivities:Read pages 36  42 from Nelson 1.5
Projectile Motion
Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. Set the angle, initial speed, and mass. Add air resistance. Make a game out of this simulation by trying to hit a target. 

Suppose you drop a soccer ball from the roof of a onestorey building while your friend stands next to you and kicks another soccer ball horizontally at the same instant. Will they both land at the same time?


How the range of a projectile is affected by launch angle (all trajectories have the same initial speed).


Velocity vector and its components during parabolic motion.

In the playlist below, video:
 Will explain the independent motion in x and y of a dropped vs horizontally thrown object.
 Will show you how to calculate the time in air and distance traveled when an object is thrown off a cliff.
 Will show you how to develop the equations of the time and range of a fired cannon ball.
 Will show you how to calculate the distance traveled by a skier jumping off a 45 degree skijump.
Practice questions 1 and 4 on page 40.
Practice question 1 on page 42.
Practice question 1 on page 42.
Task:
Solve questions 1, 2, and 4 from Nelson 1.5 Review on page 43.
Optional Extension:
Optional Extension:
 Practice question 3 on page 40.
 Solve questions 3, 5, 7, and 9 on page 43.
Reflect:
Many people struggle to understand why the vertical acceleration of a projectile is constant. What helped to clarify this concept for you?