September 23 Homework Gravity
IF YOU WERE GONE TODAY
We showed the video "Is It Possible" about the man (the size of a professional basketball player) who could scale large objects down so far that they fit into the eye of a needle easily. (about 5 min. while taking attendance and handing back papers)
The Einstein Board today:
1. Is It Possible video: Big Man Pro at the Micro World
2. Last Friday Videos of Rocket Launches for the students that missed it to time and complete
3. Demo: Law of Falling Bodies ** Washers equally spaced on a string dropped onto a sounding board
consecutive sounds shorten with time of fall.
** Washers placed so there distances from the end are perfect squares of the
first distance make consecutive sounds equally spaced time wise.
(because s is directly proportional to the time of fall squared s = kt^2)
4. Problem #8 pd 1 pd 3 pd 4 on Unit 1 Problem Sheet done by teacher to explain how to tackle a problem with givens, hidden givens, what you need to find variable, choose formula that will have these variables in it, write down formula, solve for unknown, plug in data with units, check if units come out correctly, do the calculations with the numbers, write down final answer with units, circle or highlight the final answer, and finally consider if the answer is in the ball park using common sense from your experiences in life.
5. Class broke into seven groups with one group responsible for one of the seven remaining problems to present to the class.
6. Volunteer group do a problem from the sheet.
7. Take Home Lab - Graph Your Route DUE TOMORROW.
2. Last Friday Videos of Rocket Launches for the students that missed it to time and complete
3. Demo: Law of Falling Bodies ** Washers equally spaced on a string dropped onto a sounding board
consecutive sounds shorten with time of fall.
** Washers placed so there distances from the end are perfect squares of the
first distance make consecutive sounds equally spaced time wise.
(because s is directly proportional to the time of fall squared s = kt^2)
4. Problem #8 pd 1 pd 3 pd 4 on Unit 1 Problem Sheet done by teacher to explain how to tackle a problem with givens, hidden givens, what you need to find variable, choose formula that will have these variables in it, write down formula, solve for unknown, plug in data with units, check if units come out correctly, do the calculations with the numbers, write down final answer with units, circle or highlight the final answer, and finally consider if the answer is in the ball park using common sense from your experiences in life.
5. Class broke into seven groups with one group responsible for one of the seven remaining problems to present to the class.
6. Volunteer group do a problem from the sheet.
7. Take Home Lab - Graph Your Route DUE TOMORROW.
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Reminded the Physics students that the take-home Graph Your Route Lab is due on TOMORROW. It is a 40 point lab (50% of the first test for points so a lot of points for toward the midquarter/quarter grade) so to get it done!
Also this Wednesday is an early release day where students leave about 11:25 am for the day then Friday is homecoming parade and pep rally at Gerke Field. Your first test is Oct. 1st.
Puzzle #1 distance/time; velocity/time; acceleration/time (not like homework sheet)
Here is the answer key for puzzle #1. If you wish to do it at home you'd have to print it out and cut out the 18 pieces, shuffle them, and time yourself getting them back in order.
Here is the answer key for puzzle #2. This is the same key as the homework sketch a graph done in class.
Here is the answer key for puzzle #2. This is the same key as the homework sketch a graph done in class.
Acceleration of Gravity Demo
In this demo a string with washers tied to it was dropped on a sounding board. The first string of washers had them equally spaced so when dropped each washer that had a longer time to accelerate had closed the gap quicker thus the noise sounded like each tap happened sooner than the last (like hit hit hit hit hit).
The second string had consecutive gaps between washers measured so they increased at secret amount so when drop had the same amount of time between each sound (like hit hit hit hit hit). Your job was to figure out how I calculated each new increased distance between consecutive washers. (answer given on Tues. of next week).
The second string had consecutive gaps between washers measured so they increased at secret amount so when drop had the same amount of time between each sound (like hit hit hit hit hit). Your job was to figure out how I calculated each new increased distance between consecutive washers. (answer given on Tues. of next week).
Video helper Mr. O. Place video of drop below here and delete this line.
Practice Problem Set Unit 1 Fab Five Practice (due next Thursday)
Here is the Practice Problem Sheet then here is how far we got done each period (to help get you started on them)
Period 1 Period 5 Period 7 Period 8 (football players left early for Oshkosh North H.S.)
Period 1 Period 5 Period 7 Period 8 (football players left early for Oshkosh North H.S.)
Big Pictures
1. If a huge man can excel in making extremely small figures inside the eye of a needle what are you capable of if you set your energies to accomplish something great.
2. What simple idea did Galileo discover in the early 1600's that allowed a string of washers strategically placed to...when dropped vertically...make sounds equally spaced (with a beat). For you to figure out by Tues.
3. On the puzzle, start with vel/time graphs and match the acc/time graphs to them first as you are either acc. (maintaining the same speed, or not) or not acc. so if you are speeding up you have a tooth up from 0 acc. and if slowing down a tooth down. Then line up the distance/time pieces of the puzzle by noticing that if you speed is constant, the distance/time graph will be a diagonal (positive slope if a positive speed and negative slope if the speed is a negative constant speed). If the speed is increasing then you curve up (like the right side of a smiley face) and if the speed is decreasing you curve down (like the left/right side of a sad face).
4. To use the fab five to solve problems first match the variables (like a, s, t, initial velocity, final velocity) with the given data (like if it says 3 seconds, place a t for time by the 3 seconds). Look for hidden givens (like start from rest means the initial velocity is zero and free fall means a = g = 9.8 m/s/s). Now figure out which variable they wish you to solve for and finally find which of the fab fives will help you arrive at the answer. Solve the formula for the unknown and chug and plug the data with units in and solve.
2. What simple idea did Galileo discover in the early 1600's that allowed a string of washers strategically placed to...when dropped vertically...make sounds equally spaced (with a beat). For you to figure out by Tues.
3. On the puzzle, start with vel/time graphs and match the acc/time graphs to them first as you are either acc. (maintaining the same speed, or not) or not acc. so if you are speeding up you have a tooth up from 0 acc. and if slowing down a tooth down. Then line up the distance/time pieces of the puzzle by noticing that if you speed is constant, the distance/time graph will be a diagonal (positive slope if a positive speed and negative slope if the speed is a negative constant speed). If the speed is increasing then you curve up (like the right side of a smiley face) and if the speed is decreasing you curve down (like the left/right side of a sad face).
4. To use the fab five to solve problems first match the variables (like a, s, t, initial velocity, final velocity) with the given data (like if it says 3 seconds, place a t for time by the 3 seconds). Look for hidden givens (like start from rest means the initial velocity is zero and free fall means a = g = 9.8 m/s/s). Now figure out which variable they wish you to solve for and finally find which of the fab fives will help you arrive at the answer. Solve the formula for the unknown and chug and plug the data with units in and solve.