PHYS-1600/2000PHYS-1600/2000 II5 Internal ForcesNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 11 1 [Insert Puzzler Here]

PHYS-1600/2000 II5 Internal Forces NEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015

DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 111

[Insert Puzzler Here]



ANNOUNCEMENTS

ITEM DURATION START

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

Three Blocks on a Frictionless Surface 0:25 0:10

Analyzing the Composite System 0:20 0:35

Three Blocks on a Surface with Friction 0:20 0:55

Tractor Pulling Cart 0:20 1:15

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

Dismissal 1:45

AGENDA



1 of 3

A farm tractor is accelerating over level ground. The force of friction acting upon the tractor due to the ground is best represented by which vector?

1 2 3

FFr FFrFFr

a



2 of 3

A farm tractor is pulling a wagon. The tractor is three times heavier than the wagon. The tractor starts from rest and accelerates for a short while. The magnitude of the force with which the wagon pulls on the tractor is

1. Zero.2. One-third of that with which the tractor pulls on the wagon.3. Equal to that with which the tractor pulls on the wagon.4. Three times that with which the tractor pulls on the wagon.

a



3 of 3

A farm tractor is pulling a wagon. The tractor is moving with uniform speed over the level earth. The net force acting upon the wagon is

1. To the right.2. Zero.3. To the left.

v



ANNOUNCEMENTS

ITEM DURATION START

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

Three Blocks on a Frictionless Surface 0:25 0:10

Analyzing the Composite System 0:20 0:35

Three Blocks on a Surface with Friction 0:20 0:55

Tractor Pulling Cart 0:20 1:15

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

Dismissal 1:45

AGENDA



II5 Exit Homework Problem #1



II5 Exit Homework Problem #2



1 of 3

A farm tractor is accelerating over level ground. The force of friction acting upon the tractor due to the ground is best represented by which vector?

1 2 3

FFr FFrFFr

a



2 of 3

A farm tractor is pulling a wagon. The tractor is three times heavier than the wagon. The tractor starts from rest and accelerates for a short while. The magnitude of the force with which the wagon pulls on the tractor is

1. Zero.2. One-third of that with which the tractor pulls on the wagon.3. Equal to that with which the tractor pulls on the wagon.4. Three times that with which the tractor pulls on the wagon.

a



3 of 3

A farm tractor is pulling a wagon. The tractor is moving with uniform speed over the level earth. The net force acting upon the wagon is

1. To the right.2. Zero.3. To the left.

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

II5: PLEASE HAND IN TODAY’S ACTIVITIES SHEETS

Documents

PHYS-1600/2000PHYS-1600/2000 II5 Internal ForcesNEBRASKA WESLEYAN UNIVERSITYFALL 2014-2015 DEAN SIEGLAFF NATHANIEL CUNNINGHAM of 11 1 [Insert Puzzler Here]