Intro
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Motion Intro • Written Quiz • More on proportionality • Motion Diagrams in 1-D
description
Intro. Motion. Written Quiz More on proportionality Motion Diagrams in 1-D. 2315 2761 Mdcl1 Mdcl!. PRQ Rules. General Quiz rules:. Start when you are told to Stop writing as soon as you are told to Make sure that the TA can figure out which answer you circled - PowerPoint PPT Presentation
Transcript of Intro
Motion
2315
2761
Mdcl1
Mdcl!
2315
2761
Mdcl1
Mdcl!
Intro
• Written Quiz
• More on proportionality
• Motion Diagrams in 1-D
General Quiz rules:
•Start when you are told to
•Stop writing as soon as you are told to
•Make sure that the TA can figure out which answer you circled
•Turn your paper over as soon as you are finished
•If you are not finished, look ONLY at your own paper
PRQ Rules
• You have 10 minutes
• I will give you a 30 second warning
• Please be sure to include your name AND student number!
This Quiz:
Quiz Answers
Proportionality
If x t2 x = C t2
Some constant
You can use initial conditions to find the value of the constant ‘C’. Once you do, you can use
the equation to predict future results.
- another way
QQ3 Prop
Worked Example
A spring compressed by a force of 5N is compressed by 10cm. If a force of 20N is used, how far would the spring compress, given that for a simple spring: F x, where F is the force and x the compression.
(A) 5 cm
(B) 10 cm
(C) 20 cm
(D) 30 cm
(E) 40 cm
Ken Sills
Do it this time in long form like shown in the last slide. Solve for the constant.
Motion Diagrams
• Motions Diagrams help give information about position as a function of time
• The positions in a Motion Diagram are always shown at equal time intervals
Like Movie Frames
But Overlaid
Like Movie Frames
Constant Velocity Case:
a= ?
t
x
Demo
Ken Sills
Get a large internet clock up on the projection screen. Give six students numbers, one each, from one to six. Tell the class to start counting seconds out loud (1...2...3...4...5...6...). You run in a straight line and get the appropriate student to stand beside where you were when the audience says their number. These are motion diagrams.
Extra QQ
Quick Quiz 5X - difficult
Draw a motion diagram for a bouncing ball. Start the diagram when the ball is released, and end the diagram when it gets back to the top of its bounce.
Get TAs to assist with the physics
Get TAs to assist with the physics
Do for next class:
• Read: sections 1.3 pay special attention to • Other preparation: WebCT Vectors/Scalars forum
r
Make a discussion thread that lets them list all possible vectors and scalars. Tell them that there will be a quiz question on identifying.
Make a discussion thread that lets them list all possible vectors and scalars. Tell them that there will be a quiz question on identifying.
