monday 11-26 ps
DESCRIPTION
Monday 11-26 PS. Homework. Pg 858-859 Problems 111-113, 116-125 Due Wednesday. Conversions. Divide your gram (g) mass value by 1000 to determine the kilogram (kg) value Divide your speed in (km/hr) by 3.6 to get the speed in (m/s) - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/1.jpg)
Monday 11-26 PS
![Page 2: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/2.jpg)
Homework
• Pg 858-859
• Problems 111-113, 116-125
• Due Wednesday
![Page 3: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/3.jpg)
Conversions
• Divide your gram (g) mass value by 1000 to determine the kilogram (kg) value
• Divide your speed in (km/hr) by 3.6 to get the speed in (m/s)
• (kJ) means kilojoules. Multiply the number of (kJ) by 1000 to get the value of energy in (j)
![Page 4: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/4.jpg)
Write-up for Roller Coaster Project
Discussion
![Page 5: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/5.jpg)
General information
• Write up section is due Tuesday
• Neat, typed if at all possible
• All answers must be completed in sentence form
• Define the concepts asked in question, base your question on those definitions
• Sketch may be on different paper, but have all measurements, velocity, GPE and KE information
![Page 6: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/6.jpg)
Question #1
• What Simple machines can be connected to the construction or operation of your roller coaster?
![Page 7: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/7.jpg)
Question #2, #3
• Produce a sketch (not a photocopy of some person’s sketch)
• Indicate height values to every important point on the coaster (In meters)
• Accurate line representing the track
• IF your group filmed your coaster and you can e-mail the results, I will try to get it up on the web-site
![Page 8: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/8.jpg)
Question #4
• Circle what was successfully completed on the 2 best runs on the track
• Describe, in detail, the special section(s)
![Page 9: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/9.jpg)
Question #5
• Get signatures from Me, if you have completed your runs
• Add the date on which the runs were performed
![Page 10: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/10.jpg)
Question #6
• Does the ball accelerate during the entire roller coaster run?
![Page 11: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/11.jpg)
Question #7
• Indicate on your sketch, the point of greatest velocity of the ball during the run.
• If you can’t decide between two label and explain both
![Page 12: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/12.jpg)
Question #8
• Draw a free body diagram of the ball as it rolls down the first slope.
• Arrows , direction
• Label forces
![Page 13: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/13.jpg)
Question #9
• Does the track exhibit any evidence of gaining elastic potential energy during the movement of the ball over it, during a run?
![Page 14: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/14.jpg)
Question #10
• Indicate where does the ball has its most and least amount of GPE during its run on your sketch?
![Page 15: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/15.jpg)
Question #11
• Indicate where the ball has its most and least amount of KE during its run on your sketch
![Page 16: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/16.jpg)
Question #12
• Indicate the relationship between the amount of GPE and KE the ball has as it moves up a hill on the track
![Page 17: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/17.jpg)
Question #13
• Does the ball possess the same amount of energy at the end of the run as it had in the beginning?
• Forms of energy
• Conservation of energy
![Page 18: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/18.jpg)
Question #14
• If you make your hill too steep, the ball will fly off the top of it . Why does this occur
• Inertia
• Momentum
• Newton’s laws
![Page 19: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/19.jpg)
Calculations for the roller coaster Project paper
![Page 20: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/20.jpg)
• This is due Wednesday
• Neat, typed if possible
![Page 21: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/21.jpg)
Equations
• GPE = mgh• KE = ½mv2
• a = (Vf – Vi)/t• p = mv• MA = fo / fi • W = f d• P = w / t
![Page 22: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/22.jpg)
Question #15
• Calculate the GPE at start
• What is the mass of your marble?small metal = 28.3 g clear glass = 8.5 gswirled glass = 6.0 g big metal = 67 gwood = 2.0 g
What is acceleration due to gravity on Earth?
What is the height?
![Page 23: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/23.jpg)
Question #16
• Calculate the GPE at the bottom of the first hill
![Page 24: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/24.jpg)
Question #17
• What is the difference in the amount of GPE in the problems 15 and 16?
![Page 25: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/25.jpg)
Question #18
• If the all of the ball’s energy lost from GPE was converted into KE at the bottom of the first hill, what is the velocity of the ball?
![Page 26: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/26.jpg)
Question #19
• What is the acceleration of the ball from the start to the bottom of the first hill, if it takes 5 seconds to travel between points
• Initial velocity ?
• Final velocity ?
![Page 27: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/27.jpg)
Question #20
• What is the momentum of the ball at the bottom of the first hill?
![Page 28: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/28.jpg)
Question #21
• What is the change in GPE of the ball from the start to finish of the roller coaster ride?
![Page 29: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/29.jpg)
Question #22
• How much energy of the ball was lost due to friction and sound by the end of the roller coaster?
• What else could take away some of the ball’s energy?
![Page 30: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/30.jpg)
The rest of this week we will concentrate on the equations
• Steps to solving a problem using an equation
1) Identify what is given
2) Identify what is wanted
3) Make sure all values are in correct units (kg, m, s , N, J, W)
4) Identify equation that relates the givens to what is wanted
5) Plug in givens
6) Solve for what you want
![Page 31: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/31.jpg)
Question
• A high jumper jumps 2.04 m. If the jumper has a mass of 67 kg, what is his gravitational potential energy at the highest point of the jump?
![Page 32: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/32.jpg)
What is given?
• 2.04 m
• Height at highest point of jump
• 67 kg
• Mass of person
![Page 33: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/33.jpg)
What is wanted?
• What is his gravitational potential energy at the highest point of the jump?
• GPE
![Page 34: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/34.jpg)
What equation to use
• Need to connect GPE with mass and height
• GPE = mgh
• G is the acceleration due to gravity
• G is constant on earth’s surface = 9.8 or 10
![Page 35: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/35.jpg)
Plug in and solve
• GPE = m g h
• GPE = (67) (10) (2.04)
• Around 1300 J
• The units are the units for energy, which can be used if all else is measured in m, kg, and s
![Page 36: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/36.jpg)
Question #2
• A rock is rolling down a hill with a velocity of 4.67 m/s. It has the kinetic energy of 18.9 kJ. What is the mass of the rock?
![Page 37: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/37.jpg)
Givens
![Page 38: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/38.jpg)
What is wanted?
![Page 39: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/39.jpg)
Check the units
![Page 40: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/40.jpg)
What equation will you use to connect them?
![Page 41: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/41.jpg)
Plug and solve
![Page 42: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/42.jpg)
Question
• A team of horses is hitched to a cart. The team pulls with a force of 471 N. The cart travels 2.3 km in 20 minutes. Calculate the work done on the cart and the power delivered by the horses.
![Page 43: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/43.jpg)
Horse problem
![Page 44: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/44.jpg)
Scientific Notation
• A method used to write very large or very small numbers in a more manageable way.
• 15000 = 1.5 x 104
![Page 45: Monday 11-26 PS](https://reader035.vdocuments.net/reader035/viewer/2022062217/568134c8550346895d9bedda/html5/thumbnails/45.jpg)
Write in scientific notation
• The planet of Saturn has a mass of
568 500 000 000 000 000 000 000 000 kg
In 1997, 70 294 601 planes either took off or landed at Chicago’s O’Hare airport