Physics schedule 11/14 Gravitational Potential Energy and Kinetic Energy TB p. 360 Part A Incline Lab Day 1 11/15 GPE TB p. 362 part B in your NB Incline Labe Day 2 11/16 GPE_ KE Pendulum Experiment HW GPE TB p. 363-367 CN 11/17 : Barbie Bungee Ride Challenge 11/18: Round up

Bell Ringer: Calculate the gravitational potential energy of a boy with a mass of 50kg that is at the top of a sledding hill that is 15m high? What is his KE at the bottom if he has a speed of 6m/s? Make a sketch What Is Given:------------------------ What is the problem asking for------------------------- What is the formula ------------------------------- Answer----------------- units--------------

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Bell Ringer What are three ways to describe acceleration

Read “What do you think” in textbook page 360. Explain why? Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Read “What do you think” in textbook page 360. Explain why?

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Title: TB p.360 Part A Read investigate part A as a class 2a. Height is constant 20 cm and distance changes 2b. Distance is constant 40cm and height changes

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Create a table in your notebook Height constant 20CM Distance velocity 20 cm 20cm Distance constant 40CM Height velocity 40 cm 40cm

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Bell ringer: 1. What is the GPE of a 25Kg girl at the top of a slide that is 3 m tall? What would be her KE half way down the slide? Sketch the problem---------------------- G U E S S

Distance stays the same and height changes

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp.

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Create a table in your notebook Member 1 Read Direction Member 2 run velocimeter / supplies Member 3 starts and stop ball Member4 changes height and distance ( Record data) Complete the tables from TB p 360 With your group, complete #3a and 4a-c on page 362 Graph the height and velocity for 2b Everyone write the answers in their Data

Results Height Speed 1 2 3 Question #2a Height 20cm=.2m Distance Speed Question #2b Distance 40cm=.4m Height Speed 1 2 3

Goal: I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Height constant 20CM Distance velocity 20cm 70 cm 5.7 km/h 80 cm 5.6 km/h 95 cm Distance constant 40CM Height velocity 40cm 1cm .9 km/h 3cm 2.1 km/h 17cm 4.9 km/h

I can investigate the relationship between speed at the bottom of a hill and height and distance of the ramp. Graph the height and velocity for 2b

Distance stays the same and height changes

Results Height Speed 1 2 3 Question #2a Height 20cm=.2m Distance Speed Question #2b Distance 40cm=.4m Height Speed 1 2 3

What affects speed? Question#2a Height 30cm=.3m Distance Velocity 3.64km/h 2 25cm 3.75km/h 3 60cm 3.59km/h Question #2b Distance 40cm=.4m Height Velocity 1 14cm 3.19km/h 2 17cm 4.96km/h 3 22cm 5.65km/h Answer in you Notebook: What created a greater increase in speed ?

Goal: I can understand how height affects velocity in terms of energy Bell Ringer1: Which ball will have the greatest velocity at the bottom of the ramp, if they all start at the same height? Why? A B C D All the same

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Bell ringer 2: 1. Based on the data collected in Table 1, Which of the following velocities would you predict to be at the distance of 75cm? 2.34km/h b. 3.67Km/h 4.24 km/h d. 5.45 km/h 2. What is the relationship between height and velocity In table 2 Table 1 Height 30cm=.3m Distance Velocity 1 90cm 3.64km/h 2 25cm 3.75km/h 3 60cm 3.59km/h Table 2 Distance 40cm=.4m Height Velocity 1 14cm 3.19km/h 2 17cm 4.96km/h 3 22cm 5.65km/h

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Bell ringer: Based on the data collected in Table 1, Which of the following velocities would you predict to be at the distance of 75cm? 2.34km/h b. 3.67Km/h 4.24 km/h d. 5.45 km/h 2. What is the relationship between height and velocity In table 2 Table 1 Height 30cm=.3m Distance Velocity 1 90cm 3.64km/h 2 25cm 3.75km/h 3 60cm 3.59km/h Table 2 Distance 40cm=.4m Height Velocity 1 14cm 3.19km/h 2 17cm 4.96km/h 3 22cm 5.65km/h

In your notebook, write a summary of the relationship between speed at the bottom of a ramp and both height and distance of the ramp. Based on the results from your activity. Did the height or distance change have a greater effect on the speed at the bottom of the ramp? (5-10 sentences)

Potential Energy, Energy Transfer and Path A ball of mass m, initially at rest, is released and follows three difference paths. All surfaces are frictionless The ball is dropped The ball slides down a straight incline The ball slides down a curved incline After traveling a vertical distance h, how do the three speeds compare? h 1 3 2 (A) 1 > 2 > 3 (B) 3 > 2 > 1 (C) 3 = 2 = 1 (D) Can’t tell

A ball rolls from point A to B A ball rolls from point A to B. Explain how the ball’s KE and GPE will be different from position A and B A B

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Name something you have seen in life that looks and acts like a pendulum

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Bell Ringer : Based on the data in the tables belowIf you released a ball at a height of 10 cm, what would you predict the to be velocity at the bottom Height constant 20CM Distance velocity 20cm 70 cm 5.7 km/h 80 cm 5.6 km/h 95 cm Distance constant 40CM Height velocity 40cm 1cm .9 km/h 3cm 2.1 km/h 17cm 4.9 km/h

Date: Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Textbook p.362 Part B

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Responsibilities Person 1 measurements Person 2 velocimeter / supplies Person 3 starts and stop bob Person 4 records data

What affects speed? Complete Part B 1c and 2a Height Speed at the bottom Complete Part B 1c and 2a

Date: Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing page 362 part B Height Speed at the bottom

Date: Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing Complete Part B #1-3c Notebook due Friday

Goal: I can understand how height affects velocity in terms of energy Bell Ringer : Based on the pendulum activity explain how height affects the velocity of the pendulum at the bottom.

Example of a conservative system: The simple pendulum. Suppose we release a mass m from rest a distance h1 above its lowest possible point. What is the maximum speed of the mass and where does this happen ? To what height h2 does it rise on the other side ? v h1 h2 m

Example: The simple pendulum. What is the maximum speed of the mass and where does this happen ? E = K + U = constant and so K is maximum when U is a minimum. y y=h1 y=0

Example: The simple pendulum. What is the maximum speed of the mass and where does this happen ? E = K + U = constant and so K is maximum when U is a minimum E = mgh1 at top E = mgh1 = ½ mv2 at bottom of the swing y y=h1 h1 y=0 v

Example: The simple pendulum. To what height h2 does it rise on the other side? E = K + U = constant and so when U is maximum again (when K = 0) it will be at its highest point. E = mgh1 = mgh2 or h1 = h2 y y=h1=h2 y=0

Potential Energy, Energy Transfer and Path A ball of mass m, initially at rest, is released and follows three difference paths. All surfaces are frictionless The ball is dropped The ball slides down a straight incline The ball slides down a curved incline After traveling a vertical distance h, how do the three speeds compare? h 1 3 2 (A) 1 > 2 > 3 (B) 3 > 2 > 1 (C) 3 = 2 = 1 (D) Can’t tell

Bungee Jump

Bungee Jump Barbie Bungee

Bungee Jump Objective: In this activity, you will simulate a bungee jump using a Barbie doll and rubber bands. Before you conduct the experiment I believe that _____ is the maximum number of rubber bands that will allow Barbie to safely jump from a height of 400 cm. Now, conduct the experiment to test your prediction

Barbee Bungee

Bungee Jump

Bungee Jumbee Now, conduct the experiment to test your prediction

Bungee Jump Objective: In this activity, you will simulate a bungee jump using a Barbie doll and rubber bands. Before you conduct the experiment I believe that _____ is the maximum number of rubber bands that will allow Barbie to safely jump from a height of 400 cm. Now, conduct the experiment to test your prediction

Physics Schedual 11/ 21 GPE and KE POGIL 11/ 22 GPE and KE POGIL 11/ 22 quiz GPE and KE Happy Thanksgiving HW: SF procedure, method, materials due11/27

Goal: I can understand how height affects velocity in terms of energy If you released a ball at a height of 10 cm, what would you predict the to be velocity at the bottom? Height constant 20CM Distance velocity 20cm 70 cm 5.7 km/h 80 cm 5.6 km/h 95 cm Distance constant 40CM Height velocity 40cm 1cm .9 km/h 3cm 2.1 km/h 17cm 4.9 km/h

Date: Goal: I can understand how height affects velocity in terms of energy Review Results Ramp activity Part A Review Results pendulum activity Part B

Results Ramp Activity Part A Question #2a Height 20cm=.2m Distance Speed 1 2 3 Question #2b Distance 40cm=.4m Height Speed 1 2 3

What affects speed? Ramp Activity Question#2a Height 30cm=.3m Distance Velocity 1 90cm 3.64km/h 2 25cm 3.75km/h 3 60cm 3.59km/h Question #2b Distance 40cm=.4m Height Velocity 1 14cm 3.19km/h 2 17cm 4.96km/h 3 22cm 5.65km/h

In your notebook, write a summary of the relationship between speed at the bottom of a ramp and both height and distance of the ramp. Based on the results from your activity. Did the height or distance change have a greater effect on the speed at the bottom of the ramp? (5-10 sentences)

Goal: I can understand how height affects velocity in terms of energy Independently read textbook page 363-365 and take Cornell notes in your NB Topic Title : TB p. 363 Physics talk 15 min

Goal: I can understand how height affects velocity in terms of energy https://www.youtube.com/watch?v=ASZv3tIK56k https://www.youtube.com/watch?v=IqV5L66EP2E https://www.youtube.com/watch?v=7K4V0NvUxRg

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. Bell Ringer: According to students’ results, as the length (m) increases, What happens to the pendulum’s period (T)?

Potential Energy Potential energy (PE) = stored energy of position possessed by an object Examples: The ball of a demolition machine A stretched bow Coconuts in a tree There are 2 types of potential energy:

1. Gravitational Potential Energy Gravitational potential energy = (PEgrav) the energy stored in an object as the result of its vertical position or height. The energy is stored as the result of the gravitational attraction of the Earth for the object.  Example: The PEgrav of the massive ball of a demolition machine is dependent on two variables - the mass of the ball and the height to which it is raised.

Kinetic Energy Kinetic Energy = (KE) energy of motion There are many types of kinetic energy, but we are going to focus on only one type: energy due to motion from one location to another. Examples: Roller coasters going downhill Skateboarding up and down a half-pipe Wind

Calculating GPE GPE = mgh m = mass of object (kg) g = acceleration due to gravity on Earth it equals 9.8 m/s2 Δ h = change in height of object (meters) PEgrav units are Joules(J) because we are measuring energy. Recall the weight (w) is mass x gravity (w = mg). As a result, PEgrav can also be calculated if you are given weight. PEgrav = wΔh

Kinetic Energy Calculating KE KE = ½ m v2 ½ = 0.5 or half (constant with no units) m = mass of object (kg) v2 = velocity2 or velocity x velocity (m/s) KE units are Joules because we are measuring energy.

Goal: I can understand how height affects velocity in terms of energy Bell Ringer : Based on the pendulum activity explain how height affects the velocity of the pendulum at the bottom.

With your partner complete Physics POGIL TB p363-364 #1-6 10 minutes Goal: I can understand how energy transfers between GPE and KE on a roller coaster. With your partner complete Physics POGIL TB p363-364 #1-6 10 minutes

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. With your partner complete Physics POGIL TB p363-364 #1-6 Class Share 10 minutes

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. With your partner complete Physics POGIL TB p363-364 #1-6 and 7-13 10 minutes

Goal: I can understand how energy transfers between GPE and KE on a roller coaster With your partner complete Physics POGIL TB p363-364 #7-13 Class Share 10 minutes

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. Bell Ringer: Calculate the gravitational potential energy of a boy with a mass of 50kg that is at the top of a sledding hill that is 15m high? What is his KE at the bottom if he has a speed of 6m/s?

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. Science Fair Experiment due 11/27 Data Tables and Graphical Representation of Data – You will turn in the data you collected from 10 or more trials (in the form of a table) and at least one graph showing the best values.

Date: Goal: I can understand how energy transfers between GPE and KE on a roller coaster. GPE= mgh KE = 1/2 mv2 Conservation of Energy say that GPE + KE = ME ME= mechanical energy ( total energy of the system)

Goal: I can understand how energy transfers between GPE and KE on a roller coaster. With your shoulder partner complete TB p. 370 #1-6 10 min

Date: 1 Goal: I can understand how energy transfers between GPE and KE on a roller coaster. CCRS: Interpretation of Data (IOD)20-23 Translate information into a table, graph, or diagram With your shoulder partner complete TB p. 370 #1-6 Class discussion ME = KE + GPE

TB p 363-364 and take Cornell notes POGIL on TB p 363 handout #1-13 Goal: I can understand how energy transfers between GPE and KE on a roller coaster. CCRS: Interpretation of Data (IOD)20-23 Translate information into a table, graph, or diagram Due today TB p 363-364 and take Cornell notes POGIL on TB p 363 handout #1-13 HW: TB p. 367 #1-5 HW: TB p. 371 #7-11

based on the pendulum’s positions. Goal: I can understand how energy transfers between GPE and KE on a roller coaster. Fill in the a chart based on the pendulum’s positions. mass of bob=.4kg height at #1=.24m Position of bob Height (m) GPE (J) =mgh KE (J)=1/2 mv2 GPE + KE (J) 1 .24m 2 .12m 3 0 m

Date Goal: I can understand how energy transfers between GPE and KE on a roller coaster. ME = KE + GPE

Goal: I can investigate the relationship between speed at the bottom of a pendulum and height of the period of its swing If you released a ball at a height of 10 cm, what would you predict the to be velocity at the bottom? Height constant 20CM Distance velocity 20cm 70 cm 5.7 km/h 80 cm 5.6 km/h 95 cm Distance constant 40CM Height velocity 40cm 1cm .9 km/h 3cm 2.1 km/h 17cm 4.9 km/h

Goal: I can understand how height affects velocity in terms of energy TB p. 367 #1- 3

Date: Goal: I can understand how height affects velocity in terms of energy WB p. 29-31

Goal: I can develop a roller coaster for a particular group of riders. Roller Coaster Project WB p.7

Goal: I can develop a roller coaster for a particular group of riders. On the back of workbook WB p.7 List your group of riders List 5 ideas how you will make your roller coaster different to for your group of riders Everyone in the group must complete #1-3 on WB p. 8

Below is a ball that comes to rest at position 2 and then moves to 3, 4, and to 5. If the ball has a mass of 40kg, what is its KE at position 3? c. 2000J d. 1000J

At what point does the cart travel the The cart above moves on a track form A to B to C to D. At what point does the cart have the greatest GPE? A B C D   At what point does the cart travel the The cart above moves on a track form A to B to C to D. At what point does the cart have the greatest GPE As the cart in the above image moves on the track form A to B, how do its potential and kinetic energies change?