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FORCE AND MOTION If you push or pull on something, you are using

force to try to move it or put it into motion. There

are many examples of force and motion that we

encounter in our daily lives. Below are a few examples.

Get out of bed Walk to school Open a door

http://idahoptv.org/dialogue4kids/season9/forcesmotion/facts.cfm

FORCEForce – “Strength or energy

exerted or brought to bear: cause of motion or change.”

When we push or pull objects, we are applying force.

http://www.merriam-webster.com/dictionary/force

MOTIONMotion – “an act, process, or instance of

changing place.”

When we move our legs to walk, we are putting them in

motion.

http://www.merriam-webster.com/dictionary/motion

• Friction• Gravity• Push• Pull

• Speed• Velocity• Accelerati

on• Momentu

m

FORCE VS. MOTION

DESCRIPTIONS OF FORCE

The next few slides will gives descriptions of the

different types of force that were listed on the

last page.

FRICTIONFriction – “The force that resists relative

motion between two bodies in contact.”

Friction occurs when you rub a balloon against your hair.

http://www.merriam-webster.com/dictionary/friction

GRAVITYGravity – “The gravitational attraction of the

mass of the earth, the moon, or a planet for

bodies at or near its surface.”

A coconut falling from a tree is the result of gravity.

http://www.merriam-webster.com/dictionary/gravity

MAGNETISMMagnetism – “A class of physical phenomena

that include the attraction for iron observed in a

loadstone or magnet.”

Magnets are attracted to many different types of metals.

http://www.merriam-webster.com/dictionary/magnetism

DESCRIPTIONS OF MOTION

The next few slides will give descriptions of

different types of motion that were listed on

Slide 6.

NEWTON’S LAWS OF MOTION

Sir Isaac Newton had three laws of motion. In the next few pages his

three influential laws will be defined for you.

NEWTON’S 1ST LAW

“An object at rest will remain at rest unless acted on by an unbalanced force. An object

in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.”

http://teachertech.rice.edu/Participants/louviere/Newton/law1.html

NEWTON’S 2ND LAW

“Acceleration is produced when a force acts on a mass. The greater the mass (of the object

being accelerated) the greater the amount of force needed (to accelerate the object).”

http://teachertech.rice.edu/Participants/louviere/Newton/law2.html

NEWTON’S 3RD LAW

“For every action there is an equal and opposite re-action.”

http://teachertech.rice.edu/Participants/louviere/Newton/law3.html

MOMENTUMMomentum – “A property of a moving body

that

determines the length of time required to bring

it to rest.”

A fast moving car struggles to stop quickly due to its

forward momentum. http://www.merriam-webster.com/dictionary/momentum

ACCELERATIONAcceleration – “To cause to move faster.”

The car accelerated to a high speed very quickly.

http://www.merriam-webster.com/dictionary/accelerate

SPEEDSpeed – “The act of moving swiftly.” OR

“The

rate of motion.”

A cheetah has the ability to run at a high rate of speed.

http://www.merriam-webster.com/dictionary/speed

VELOCITYVelocity – “The rate of position along a

straight

line with respect to time.”

A professional soccer player can kick a soccer ball with

powerful forward velocity.

http://www.merriam-webster.com/dictionary/velocity

WEBSITE REFERENCESDialogue For Kids: Force and Motion. Idaho Public

Television. January 15, 2008. Idaho State Board of Education. http://idahoptv.org/dialogue4kids/season9/forcesmotion/facts.cfm. July 2, 2011.

Newton’s Laws of Motion. Georgia Louviere. October 24, 2006. Rice University. http://teachertech.rice.edu/Participants/louviere/Newton/ July 2, 2011.

DEFINITION REFERENCES“acceleration.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July

2011)

“force.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“friction.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“gravity.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“magnetism.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“momentum.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“motion.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“speed.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)

“velocity.” Merriam-Webster.com. 2011. http://merriam-webster.com (2 July 2011)