Do Now? (pg 185)

Section 5 The Range of Projectiles: The Shot Put

6minute

s!

1. Describe the trajectories of projectiles launched from the ground at various angles

2. Describe how a greater launch speed of a projectile might change the range even if launch angle stays the same

Checking Up 2-4

Projectile Simulator

Homework :D1.

Physics to Go 2-4 & 5 FridayDecember 11th

2.

Study for Quiz & WDYTN

FridayDecember 11th

Turn

It

In

!

Agenda

• Do Now 10

• Checking Up 5

• Simulation 5

• Physics Talk 15

• Mythbusters 5

• Checking Up 5

Objectives 2-5We are learning… All objects on Earth fall with the same acceleration due to

gravity = 9.8 m/s2 (if air resistance is ignored)

We will be successful when we can… Measure the acceleration due to gravity Calculate the speed attained by an object that has fallen

freely from rest Identify the relationship between the average speed of an

object that has fallen freely from rest and the final speed attained by the object

Calculate the distance traveled by an object that has fallen freely from rest

Use mathematical models of free fall and uniform speed to construct a physical model of the trajectory of a projectile

Use the motion of a real projectile to test a physical model of projectile motion

Use a physical model of projectile motion to infer the effects of launch speed and launch angle on the range of a projectile

BIG Questions

1.What is the acceleration due to gravity?

2.What determines the range of a thrown object?

Angry Birds1. How do you get a bird to travel the farthest?

2. Can you find multiple launch angles that will land on the same spot?

3. What happens when you launch birds at the same angle but change the initial speed?

4. What happens when you launch birds at the same velocity but change the initial angle?

5. What launch angles have the longest time in flight?

6. What launch angles have the shortest time in flight?

Projectile Motion ModelsProjectiles have 2 motions that act at the same

time

1. Horizontal: constant speed caused by launch

force

2. Vertical: downward acceleration due to gravity

If air resistance is ignored, the trajectories of all projectiles are parabolas

Projectile MotionDiagram shows trajectories of projectiles

launched at many different angles, but with same initial speed

Projectile MotionAll projectiles travel in _______________

________ angle produces greatest range or longest horizontal distance

Horizontal distance traveled from complementary angles (_____________) are identical

Small angles have greater _________________ velocities but are in the air a __________ time

Large angles have ____________ horizontal velocities but are in the air a __________ time

Projectile Simulator

Myth Busters

Checking Up 2-56

minutes!