Physical Science 9
Lesson Plans for February 28-March 4
Monday
Objectives:
1. Describe friction and Identify factors that determine the friction force between 2 surfaces.
2. Explain how mass differs from weight
3. State the Universal Law of Gravitation
4. Describe the effects of gravity and air resistance on an object in free fall.
Pg 323 Section 3 “Friction and Gravity”
I. Friction
a. Nature of force
b. Is friction useful?
c. Controlling friction
II. Gravity
a. Free fall vs. projectile motion
b. Air resistance
c. Weight = mass X acceleration
III. Universal Gravitation
Instructional method:
· Group discussion on section 3 20 minutes
· With study buddy students will answer the key concepts on pg 323
o What factors determine the friction force between two surfaces?
o How does mass different from weight?
o What is the law of universal gravitation?
Tuesday—Forces and Motion Lab—“Egg Drop”
Objectives:
1. Understand how air resistance, gravity and terminal velocity relate to each other.
2. Predict which egg will survive the fall and why will it survive.
Instructional method:
· Students will work with a study buddy to construct their parachute and complete the lab. All hour
Wednesday
Objectives:
1. State Newton’s 3rd Law of Motion
2. Define and calculate momentum and state the Law of Conservation of Momentum.
Pg 332 Section 4 “Action and Reaction”
I. Newton’s 3rd Law of Motion.
a. Equal but opposite
b. Action-reaction in action
II. Momentum
a. Momentum=mass X velocity
III. Conservation of Momentum
a. Two-moving objects
b. One-moving object
c. Two-connected objects
Instructional method:
· Group discussion on section 4 20 minutes
· Individual study time-work on a review problem worksheet on momentum and forces 20 minutes
Friday—Lab on Friction “Science Friction”
Objectives:
1. Students will investigate three types of friction—static, sliding and rolling.
2. Students will determine which has the strongest force and which has the weakest force.
Instructional method:
· Students will work with a study buddy and complete the lab. All hour.
Science Standards
· Recognize that inertia is the property of on object that causes it to resist changes in motion.
· Explain and calculate the acceleration of an object subjected to a set of forces in one dimension (F=ma).
· Demonstrate that whenever one object exerts force on another, a force equal in magnitude and opposite in direction is exerted by the second object back on the first object.
· Use Newton’s universal law of gravitation to describe and calculate the attraction between massive objects based on the distance between them.