A RACE CAR DRIVER WANTS TO TIE OR BREAK THE RECORD FOR AVERAGE SPEED IN A 500-MILE RACE ON A PARTICULAR TRACK. THE RECORD TIME TO COMPLETE THE RACE IS 2.7 H. WHAT AVERAGE SPEED MUST THE DRIVER MAINTAIN TO TIE THE RECORD?  A ABOUT 200 MILES PER HOURB A LITTLE UNDER 185 MILES PER HOURC A LITTLE OVER 185 MILES PER HOURD ABOUT 100 MILES PER HOUR

BELLWORK 3-17-15

Work Quiz

• 1.C 12.A 23.C

• 2.B 13.B

• 3.D 14.C

• 4.A 15.B

• 5.B 16.C

• 6.C 17.A

• 7.D 18.C

• 8.A 19.D

• 9.C 20.B

• 10. B 21.D

• 11.B 22.A

NEED TO KNOW

•Read page one of “The Science of Hockey”. How is Laura Stamm teaching hockey players to become better at the game? Give specific examples from the text.

NEWTON’S 1ST LAW- AN OBJECT AT REST REMAINS AT REST, AND AN OBJECT IN MOTION REMAINS IN

MOTION AT A CONSTANT SPEED AND IN A STRAIGHT LINE UNLESS ACTED ON BY AN UNBALANCED FORCE.

• Net force = combination of all of the forces acting on an object• When net force is 0 N, the forces are

balanced.• When the net force on an object is not 0 N, the forces on the object

are unbalanced.• Newton’s first law of motion is sometimes called the law of inertia.• Inertia is “want to,” when an object resists change because it “wants

to” keep going in a straight line. • Inertia depends on an object’s mass. • The more mass an object has, the more inertia an object has.

NEWTON’S 1ST LAW OF MOTION

NEWTON’S 2ND LAW- THE ACCELERATION OF AN OBJECT DEPENDS ON THE MASS OF THE OBJECT AND THE AMOUNT OF FORCE APPLIED.

• Weight vs. Mass• Weight is a measure of gravity on an object.• Mass is the amount of matter (what an object is made

of) in an object.

• F (force) = m (mass) x a (acceleration)• F = m x a

• a (acceleration) = F (force) ÷ m (mass)• a = F ÷ m

• If you want to increase the acceleration of an object, you need to decrease its mass.

DINNER ANYONE?

NEWTON’S 2ND LAW OF MOTION

NEWTON’S 3RD LAW- FOR EVERY ACTION THERE IS AN EQUAL AND OPPOSITE REACTION.

•Newton’s third law can be simply stated as follows: All forces act in pairs.

NEWTON’S 3RD LAW OF MOTION

EXIT TICKET- NEWTON’S LAWS COMIC STRIPS

• Begin working on Newton’s Laws Comic Strips

• Explain what is going on in the Newton’s Laws comic strips at the bottom of the page.

• Give each explanation a title (one of Newton’s Laws)