MARCH 24, 2014•Homework: Complete Calculating Net Force sheet and Section Assessment Question 1C on pg. 50 in textbook.- Complete question on the back of Net force sheet.

•Do Now: Take out Finding Forces worksheet, Open textbook to page 45.

FRICTIONWho slides down the hill easier, Guy A or Guy B?

Guy- A-Why?

WHY IS IT MORE DIFFICULTTO WALK ON ICE THAN

THE FLOOR?

DEFINE FRICTION• The force that two surfaces exert on each other, when they run against each other.• Friction acts in the opposite direction of motion

What two factors effect the strength of the force of friction that occurs between two objects?

-Smooth Surfaces produce less friction

-Rough Surfaces Produce more friction

FRICTION

• http://www.youtube.com/watch?v=lOAIvTwPsZQ

WHICH TYPE OF FRICTION KEEPS YOUR SHOES FROM SLIPPING ON

THE FLOOR?

Static friction

Think about how important friction is in your favorite sport or activity?

MARCH 25, 2014-Homework: Finish Class work-& Check- in slip-

-Do Now Write down homework, Take out Net force worksheet/ 1C, open T.B. to pg 46: Update T.O.C:

Pg. 5: Gravity: Universal LawPg. 6 Factors Affecting gravity: Weight and MassPg. 7 Gravity and Motion

NAME THAT FRICTION TYPE?• The harder things are rubbing together the more friction there is

NAME THAT FRICTION!!!Sliding Friction Fluid Friction

What is the net force of this skater?What is the strength and the direction?

120N -100N

20 N to the right

GRAVITY• Turn to page. 46 in Textbook and pg. 5 in notebook

•Universal Gravitation• Factors Affecting Gravity, and •Weight and Mass

• Read the rest of 46-47 and for each of the headings write the main ideas found in the text.