Daily Lesson Plan - Mr. Gabrielse's Physics Class



Mr. Gabrielse |Date: 1/22/2008 | |

A. Unit: Momentum

Topic: Introduction to Momentum

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B. MSDE and BCPSS Standards

CLG 5.1.1: Use analytical techniques appropriate to the study of physics

CLG 5.1.3: Analyze and explain how changes in an object’s motion are described by Newton’s Laws.

CLG 5.7.2: The student will recognize the important role that mathematics serves when solving problems in physics.

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C. Lesson Objectives:

• Students will demonstrate that they know what momentum is by measuring the momentum of collision carts.

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D. Opening Activity/Drill

• As students enter: take attendance

• Drill:

1. What is Newton’s 1st law?

2. What is the difference between weight and mass?

3. How many kilograms is 42g?

4. How many meters is 256 cm?

Modifications: The drill will be on the board and read orally.

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E. Development

• Review the Drill

• Engagement of Students

o Think Time: Imagine that you are crossing the street and you get hit by a moving vehicle. In which of the following scenarios would you be least likely to sustain massive injuries?

A. (1 finger) A truck moving at 15 mph.

B. (2 fingers) A cyclist moving at 30 mph

o The answer involves momentum.

Modifications: Extra processing time will be allotted to students who require it.

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• Exploration Activities

o Hold up a ping pong ball and a golf ball and draw a stick figure on the board.

▪ Question: What would hurt the student on the board more, a ping pong ball or a golf ball? Why?

▪ Expected Answer: The golf ball because it has more mass

o Throw the ping pong ball at a stick figure drawn on the board as fast as possible. Then lightly toss the golf ball at the figure on the board.

▪ Question: Which do you think hurt more? Why?

▪ Answer: The ping pong ball because it was moving at a higher velocity.

o Both mass and velocity are equally important. That’s why we look at them both at the same time and call it momentum.

Modifications: Questions will be encouraged and answered. Extra processing time will be allotted.

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• Explanation (Notes)

1. Momentum (p) = mass (m) times velocity (v) ( p = m v

i. Historically we use p for momentum since m is for mass

B. An object’s momentum never changes unless it experiences a push or a pull

i. So if I throw this ping pong ball out the window it will just keep on going?

1) Why not… What if …

C. SI unit for momentum is [pic]

i. The unit for momentum is the unit for mass (kg) times the unit for velocity (m/s)

Modifications: Notes will be read orally and written on the board.

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• Extension

o Measure the momentum of a crash cart three times

o Use a balance to find the cart’s mass

o Use a meter stick and stop watch to calculate average velocity

o Start the homework early

Modifications: The workload will be modified according to individual student’s needs.

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• Evaluation/Assessment

o Collect & grade lab

o Grade worksheet

Modifications: The workload will be modified according to individual student’s needs.

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F. Closure

• Go over results.

• Assign homework.

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G. Home Assignment

• Read Glencoe Physics (p. 199-206): section 9.1

• Worksheet: Calculating Momentum (Hint: 1 miles/hr = 0.44704 m/s)

• Bring bottle rocket materials (2-liter soda bottle) cardboard, tinfoil, glue, fins, paint, decals)

Momentum Notes:

1. Momentum (p) = mass (m) times velocity (v) ( p = m v

* Historically we use p for momentum since m is for mass

A. An object’s momentum never changes unless it experiences a push or a pull

i. So if you throw a ball out the window will it just keep on going?

B. SI unit for momentum

i. The unit for momentum is the unit for mass (kg) times the unit for velocity ([pic])

ii. [pic]

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