PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN...

PHYS-1600/2000 II2 Free Body Analysis NEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015

DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 121

Today’s Puzzler:A pot of water is brought to a steady boil on a stove. A thin plastic cup of cool water is placed in the boiling water, but no part of the cup touches the pot.

Will the water in the cup start to boil if you wait long enough?1) Yes 2) No

(This can be tested at home…)

http://csit.nebrwesleyan.edu/depts/physics/phys1600-2000/index.html

http://www.deansieglaff.flyurl.net/



ITEM DURATION START

Introductory Concept Survey (Individual) 0:10 0:00

Analysis of Cart Pulled by Two Hanging Masses 0:30 0:10

Application of Analysis Results 0:30 0:40

Hanging Sign Problem 0:25 1:10

Survey Re-vote (Group Discussion Mode) 0:10 1:35

Dismissal 1:45

AGENDA

Announcements





1 of 3Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A and B are equal mass bodies. After being given the initial velocity shown, cart C will

1. speed up.2. stay at the same speed.3. slow down and stop.4. slow down, stop, and reverse its direction

C

B

A

v





2 of 3Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A is heavier than B. After being released into motion from rest, the tension in A’s rope will

1. Remain greater than that in B’s rope.2. Become equal to that in B’s rope.3. Become less than that in B’s rope.

C

B A





3 of 3

A skydiver is falling with the parachute open. The rate of descent is a steady 8 m/s. We can conclude that the net force acting upon the skydiver is

1. upward.2. zero.3. downward.

v





ITEM DURATION START

Introductory Concept Survey (Individual) 0:10 0:00

Analysis of Cart Pulled by Two Hanging Masses 0:30 0:10

Application of Analysis Results 0:30 0:40

Hanging Sign Problem 0:25 1:10

Survey Re-vote (Group Discussion Mode) 0:10 1:35

Dismissal 1:45

AGENDA

Announcements





II2 Exit Homework Problem #1





1 of 3Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A and B are equal mass bodies. After being given the initial velocity shown, cart C will

1. speed up.2. stay at the same speed.3. slow down and stop.4. slow down, stop, and reverse its direction

C

B

A

v





2 of 3Cart C is connected to hanging masses A and B by means of ropes and pulleys as shown. A is heavier than B. After being released into motion from rest, the tension in A’s rope will

1. Remain greater than that in B’s rope.2. Become equal to that in B’s rope.3. Become less than that in B’s rope.

C

B A





3 of 3

A skydiver is falling with the parachute open. The rate of descent is a steady 8 m/s. We can conclude that the net force acting upon the skydiver is

1. upward.2. zero.3. downward.

v





1 4 1 4 1 4 1 4

2 5 2 5 2 5 2 5

3 3 3 3

PROJECTION SCREEN

6 6 6 6

HAND IN TODAY’S ACTIVITIES SHEETS



PHYS-1600/2000PHYS-1600/2000 II2 Free Body AnalysisNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN...

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