AMTA Training Mechanics Day 6

Key Activities:

· Quick summary (but we did not do ourselves) the acceleration of a dropping object lab using a photogate and a picket fence. Students were to determine if mass affects the acceleration of gravity. NOTE: we do not recommend you talk about “g”.

· Force is defined an introduced.

· Types of forces broken down into interactions, and forces at a distance.

· Take some time to introduce the unit of force.

· Introduce some formalism around naming of forces (friction, normal, tension)

· A bunch of demos around normal forces that they exist, and that they seem to come in pairs. Hovercraft demos, i.e. what happens when you don’t have friction.

· Rules/Steps for generating Free-Body-Diagrams are given.

· Practice worksheet, whiteboarding on Free-Body-Diagrams.

· Quick demo with opposing Force Sensors and LoggerPro, surprising result.

Day 6

Monday, June 22, 2015

7:37 AM

Stopping (turn off blower) Have a student summarize what you have noticed.
V0= –>

V = 0

FN on the

Hovercraft

By the air

Fg on hovercraft or person by gravity.
That previous recording was a little too long.

<<Day 6.wmv>>

Problems 4&5

Group #1

Video recording started: 11:37 AM Monday, June 22, 2015

<<Day 6.wmv>>

Problem #6

Group 2

Video recording started: 11:38 AM Monday, June 22, 2015

<<Day 6.wmv>>

Unit IV

Worksheet 1

Problem #7

Group 3

Video recording started: 11:41 AM Monday, June 22, 2015

You should show components if you
You need to define the system.
Can you resolve gravity along the two strings?

Only if the angle between them is 90-deg

What if the ceiling is pulled away a little bit? Does the force get bigger?

<<Day 6.wmv>>

Group 4

Prblem 8

Video recording started: 11:48 AM Monday, June 22, 2015

Real quick lab activity…

Created with Microsoft OneNote 2013.

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