TUESDAY, DEC. 2ND p. 92, 93

TUESDAY, DEC. 2ND

9212/2/14 Tues.L.T.: I can analyze the forces on objects and predict the object’s motion.DO NOW: Turn to p. 70 in the book. What forces are acting upon the bowling ball at this moment? Are the forces balanced or unbalanced? Why?…………………………Reflection Qs:Did I fully participate by discussing with my peers, interacting with the stations, and diagramming/labeling the forces?Is there any station that I was confused about? Why or why not?

93Title: Balanced and Unbalanced Forces 2Mt. T: Iron Shavings and Magnets

Lincoln: Marble and Cup

Wilson: Magnets and Paper Clips

Foss: Mr. P. Hish

Stadium: Block and Sandpaper

SAMI: Volleyball

Lincoln: marble trapped and rolling underneath cup

Mt. Tahoma: iron shavings and magnets

Foss: Mr. P. Hish swimming in ocean

Wilson: magnets with paper clips

Stadium: block and sandpaper

SAMI: volleyball

Announcements:

Quiz on Forces this Friday! (3 standards = 3 100 pt. sections)

Also, SNB Check will be given out this Thursday – due Monday. We are looking to avoid lunches with Ms. Kim and calls home!

- Forces to know: gravitational pull, elastic force, frictional force (sliding and air), magnetic force, added force, normal force- be able to analyze the forces affecting a still object or one in motion and describe whether forces are balanced or unbalanced.

- be able to explain the frictional force acting on an object

- Given 2 different masses that receive the same unbalanced force, predict which will move more quickly.

SAMI: Volleyball

DO NOW: Imagine a volleyball player jumping up into the air as the ball is set to them perfectly. She reaches back and BAM! spikes the ball into the opponents’ side. Point!

Snapshot: Mental pic of vball player spiking the ball – the moment her hand touches the ball

Object: volleyball

SNB: Diagram your snapshot. What forces are acting upon the volleyball? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?

Lincoln: Marble and Cup

DO NOW: Turn your cup upside down and trap the marble underneath it. Move the cup around in a circular motion on the tabletop.

Snapshot: Take a mental picture of 1 sec. when the marble is moving underneath the cup.

Object: Marble

SNB: Diagram your snapshot. What forces are acting upon the marble? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?

Mt. Tahoma: Iron Shavings and Magnets

MAKE SURE YOU DO NOT TAKE THE MAGNET OUT OF THE BAGGIE OR MOVE THE SHAVINGS OFF OF THE PAPER!

DO NOW: Move the magnet inside the baggie underneath the paper with the iron shavings.

Snapshot: Take a mental picture of a moment where the iron shavings are interacting with the magnet’s magnetic field.

Object: iron shavings

SNB: Diagram your snapshot. What forces are acting upon the iron? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?

Foss: Mr. P. Hish

DO NOW: Imagine Mr. P. Hish in his natural habitat, the ocean. He is peacefully swimming along.

Snapshot: Mental pic of a moment Mr. P. Hish is swimming (no predators, no weather disaster, etc.)

Object: Mr. P. Hish

SNB: Diagram your snapshot. What forces are acting upon Mr. P. Hish? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?

Wilson: Magnets and Paper Clips

DO NOW: Take 1 magnet and see how many paper clips you can attract in a line. Then take several magnets (you choose how many) and see how many paper clips you can attract in a line.

Snapshot: Take a mental picture of the 1 magnet and paper clip(s) vs. many magnets and paper clips.

Object: paper clip(s)

SNB: Diagram your snapshot. What forces are acting upon the paper clip(s)? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?

Stadium: Block and Sandpaper

DO NOW: Make an incline with the books. (You choose how steep of an incline.) Set your block on top. Observe. Remove block and lay the sandpaper on top of your incline. Set your block on top of the sandpapered incline. Observe.

Snapshot: A moment when block was on top of the normal incline and a moment when the block was upon the sandpapered incline.

Object: block

SNB: Diagram your snapshot. What forces are acting upon the block? Use arrows and labeling to describe the forces. Are the forces balanced or unbalanced? How do you know?