Thursday, September 27, 2012

Action-Reaction Forces AVID due 10/3 HONORS Due 10/2

Due Date:  Tuesday, October 2 for HONORS
Due Date  AVID: Wednesday, October 3 for AVID
Assignment: Use magazines, internet-images or drawings to create an illustration of action-reaction forces.
Materials Needed: plain white paper, scissors, glue or tape, markers

Examples:










Helpful Information:
Remember: When you jump, you push on the ground with your feet. This is the action force.  The ground pushes back on your feet with an equal and opposite force. This is the reaction force. You move upward from the jump because the ground is pushing you!



More Information: Action-reaction forces, though equal and opposite, do not cancel each other out because they act on different objects. Think about a volleyball player: when bumping the ball, the player esters an upward force on the ball. In return, the ball exerts an equal but opposite force on the wrist of the player. The action and reaction forces are acting on different objects (ball acts on wrist, wrist acts on ball)!



Compare and contrast the volleyball example above to this one: think about two volleyball players extorting equal and opposite forces on the ball. This would cancel out because both forces are being applied to the ball!  (hands act on ball and other hands act on ball)







Wednesday, September 26, 2012

Newton's Laws Diagrams AVID

Due Date: Monday, 10/1 (AVID)
Assignment: Create a diagram depicting the first two laws of motion

If you have not completed your quiz that should be your #1 priority this weekend. I will still give credit but there will be some point deductions for this late work.  For instructions about correcting your quiz reference the blog post below entitled "Homework 9/24 9/25 9/26"

The homework due Monday (AVID) is to make a diagram of Newton's First and Second Laws of Motion. Do this on a blank sheet of white paper.

Directions: Take a blank sheet of paper and create an image depicting Newton's First Law and Newton's Second Law.  Be sure to include an explanation of the diagram. An explanation may be as simple as stating the law, labeling the parts of the drawing or telling a story.  Be creative!



If you have questions you may email me at cecilia.bonaduce@pgcps.org or comment on the blog posts!  

Friday, September 21, 2012

Homework due 9/24, 9/25, 9/26

Honors and AVID students must correct their quizzes for homework.
Students will be able to earn points back for their quiz by completing this assignment.  Points will only be given to students who meet all of the assignment requirements.

NOTE: the various due dates are based on what class you are in, check your agenda books to double check you due date.

Requirements:
- explain why incorrect answers are incorrect
- show all work to find the correct answers
- do this on a separate sheet of paper and be prepared to turn in your original quiz as well as your corrections


Velocity and Acceleration

1.  Motion is measured by comparing position to a stationary ___________________ .
A. vector                                    C. graph origin
     B. reference point                     D. displacement

2. What two things make up velocity? _________and __________            

3. You know that a car is traveling at a speed of 100 km/h -----------------.  What what else do you need to know to find the velocity of the car?
A. the brand of the car                   C. the length of the car
B. the direction the car is going     D. the distance the car traveled

____  4. Acceleration measures a change in:
A. location                                      C. position
B. velocity                                      D. direction

____  5. Which of the following is NOT an example of acceleration?
A. a school bus coming to a stop
B. a car turning right into a parking lot
C. a person walking on a treadmill at a steady rate
D. an airplane speeding up along a runway
6-10. Complete the chart. Be sure to write out the UNITS for each answer.
Distance
Time
Speed
Triangle
 50 centimeters
10 seconds
6.__________

9 kilometers
3 hours
7.__________

8.________
7 minutes
3 km/minute

45 meters
9._______
5 m/minute

10._______
12 seconds
4 mm/sec