DAY 82
Quiz Friday: Review Momentum & Impulse concepts from Day 77 through 83
#Goals: SWBAT...
1.Calculate Impulse, change in momentum, and force
WARM-UP & HW Check:
Use the impulse-momentum change principle to fill in the blanks in the following rows of the table. As you do, keep these three major truths in mind:
The impulse experienced by an object is the force•time.
The momentum change of an object is the mass•velocity change.
The impulse equals the momentum change.
A. Find the missing info from the data below
B. As you saw in last nights video, cars have crumple zones.
1. If you were in a crash, why would you want your car to partially crumple?
2. Which parts of the car don't you want to crumple? Why?
CLASSWORK:
1. 082A: HW Review
2. 082B: Practice problems:
A. Complete the chart that looks like the warm-up problem. It's about halfway down the page
https://www.physicsclassroom.com/class/momentum/Lesson-1/Momentum-and-Impulse-Connection
B. Complete the Check Your Understanding problems
Learning at Home (HW)
Remind App message me with any questions
- Complete 082B
- 082C: Review the concepts of Impulse and Collisions by looking at how a helmet protects our heads. Take notes, and answer the questions
Edpuzzle Video: https://edpuzzle.com/media/588646c5fc574b496133fff8
- Quiz Friday: Review Momentum & Impulse concepts from Day 77 through 83
a lonely set of problems with no home...
Your brother’s mass is 35.6 kg, and he has a 1.3-kg skateboard. What is the combined momentum of your brother and his skateboard if they are moving at 9.50 m/s?
Determine the momentum of a ...
a. 60-kg halfback moving eastward at 9 m/s.
A car possesses 20 000 units of momentum. What would be the car's new momentum if it's velocity is tripled
#Goals: SWBAT...
1.Calculate the force of impact
2. Define Impulse
3. Calculate Impulse
WARM-UP & HW Check:
A. What is Impulse equal to?
B. List five devices/objects which increase the time of a collision
C. Solve: A 50 kg Jalen steps off a 100.0 cm high wall. If Jalen DOESN'T BEND HIS KNEES such that he stops his downward motion and the time during the collision is 0.02 seconds, what is the force of impact caused by the ground on Jalen?
CLASSWORK:
1. 082A: Impulse Notes
- In addition to your notes on Impulse from last nights video...
Formula: FΔt or mΔv or Δp
Definition: product of the average force and the time interval of the collision.
Units: Newton-seconds
Symbol: Impulse, Imp, J, I
2. 082B: Practice problems:
Consider a collision of a tennis ball with a wall. Depending on the physical properties of the ball and wall, the speed at which the ball rebounds from the wall upon colliding with it will vary. The diagrams below depict the changes in velocity of the same ball. For each representation (vector diagram, velocity-time graph, and ticker tape pattern), indicate which case (A or B) has the greatest change in velocity, greatest acceleration, greatest momentum change, and greatest impulse. Support each answer.
Learning at Home (HW)
- Complete 082B
- Watch: https://www.youtube.com/watch?v=ph48Xwj_eS8
There is no Edpuzzle, so you'll need to pause and answer questions as listed below:
Time Instructions
1:07 1. Which ball experiences the greater change in momentum?
2:00 2. Are the change in momentum and the impulse different?
2:50 3. How does the crumple zone in the Honda Civic make the car safer for the driver during a collision?
3:30 4. Copy the problem "Calculate the impulse and the force on both the car and the man". Write the given info
6:00 5. Pause the video, and solve the problem. When you're done, unpause, and check your answer :)
WARM-UP:
1. Two hydrogen atoms are walking down the street when one of them says to the other, “Oh no I think I lost my electron!”. The other atoms says, “Are you sure?”
“Yes! I’m positive!”
Does this joke make sense? Why/why not?
CLASSWORK:
1. #082A: HW Review: LINK
2. #082B: Coulombs Law Also, What is a Coulomb? LINK
3. Waves Review
On Day 66, we completed 1-23, 34. You can redo those questions, as questions like those will be on the exam
Newer material to practice today includes # 35, 36, 38 from the above link, and....
from the Sound and Music (LINK) questions: 1, 3, 4, 9-12, 14, 28, 31, 52,
from the Light and Color (LINK) questions: 1ad, 12, 13, 15, 17, 19, 21c,
4. Day 73 Quiz corrections (continued) (if time allows)
HOMEWORK
Wave Exam Monday, May 14