Physics Lesson Plans
Week of Feb 4-8
1. Prebell – sample problems
2. Free Fall Experiment:
a. Students will compare fall times of various objects. From the time it takes them to fall, they will determine their final velocities and acceleration.
b. Students will compare
- Objects that have the same mass but different shapes (plastic ball and a sheaf of papers)
- Objects that have the same shape and are made from the same material but have different masses (set of brass weight)
- Objects that are made from the same material and have the same mass, but are different shapes (flat sheet of paper, slightly crumpled paper, and tightly wadded piece of paper)
c. Closure – Students will draw conclusions from the experiment.
1. Prebell – Why do some objects fall faster than others on the Earth, but not on the moon?
2. Activity: Calculate reaction times
a. Students will use a meterstick to determine their reaction times when catching a falling object
b. They must use the distance that meterstick falls before it is caught rather than trying to time their reactions. This displacement and the acceleration caused by gravity will be plugged into the equation y = ½ at2 to determine reaction time (t).
3. Lecture/ Discuss – objects that are thrown into the air
a. What happens at each point of an objects trajectory
b. How to solve problems when objects are thrown into the air rather than being dropped?
4. Demonstration – Thrown a ball into the air. Students will answer Socratic Questions concerning the motion of the ball.
5. Problem Solving – How can we use the same equations we have been using to solve problems in which objects are thrown into the air (if we know how long the ball is in the air, we can calculate how high the ball went and the velocity with which is was thrown).
6. Closure – What other factors can act on these objects that can throw off our results (answer: AIR RESISTANCE!)
1. Prebell – Read lab handout
a. Students will first determine the effect of air resistance on a tennis ball. They will drop the tennis ball from a pre-measured height and measure how long it takes for the ball to hit the ground. This will be done at least three times. They will calculate the its acceleration of the ball based on its fall time and compare it to the acceleration of gravity.
b. Class will walk to practice field to complete the rest of the lab.
c. Each student will throw a tennis ball into the air and catch it. The other students will measure how long is in the air. From this, they will calculate displacement and the speed with which it was thrown. Each student must do this at least three times so that we can get an average throwing speed.
3. Closure –
a. compare student results. Who had the fastest throwing speed.
b. What are some errors that could have caused you to get inaccurate results (difficult to measure exact times, ball had to be caught at the exact height it was thrown from, etc)
1. Prebell – answer questions on page 62 of textbook
2. Review Falling Objects Concepts (Socratic Questions)
3. GROUP CHALLENGE!!! Problem Set 2F from Workbook – Students will work in teams to see who can get the most correct answers in the shortest amount of time.
4. After the winner is determined, students will work individually to correct any problems missed or not completed during the group challenge.
5. Closure – Review certain problems from the worksheet and from test tomorrow
1. Explain, in detail, what happens to an object that has been thrown into the air. Explain in terms of acceleration, displacement, and velocity.
2. Quick Review of Test (Socratic Questioning)
4. After test, read over section 3-1 of textbook and answer questions and make vocabulary flashcards for chapter 3 terms.