Andy BosleyChrissy DeHaven

Teaching:

5th Grade Science lesson on simple physics

Students will be able to create physics problems using the Crayon Physics game.

Students will begin learning about Sir Isaac Newton’s three laws of motion.

Students will be able to evaluate problems to determine one of any number of solutions.

Students will be able to solve and explain basic physics problems through the use of this software.

Todays Objective:

Laws of Motion

•How Many Laws of Motion do you think

there are?

Sir Isaac Newton• Nationality: British• Born: 4 January 1643

Death: 31 March 1727

1. Defined the law of gravity, verifying Kepler’s laws of planetary motion and essentially ending the geocentric view of the universe.2. Defined the three laws of motion 3. Articulated principles of conservation of momentum & angular momentum4. Invented the reflecting telescope and defined a corpuscular theory of light5. Inventor of calculus (in parallel with Gottfried Leibniz) and applied it directly to the understanding of physical systems

Sir Isaac Newton

More on Newton

• Sir Isaac Newton lived during the 1600s. He was a funny looking man with wild hair and a bit stuffy. Like all scientists, he made observations about the world around him. Some of his observations were about motion. His observations have been supported by more data over time; and we now call these Newton’s Laws of Motion. His laws of motion explain rest, constant motion, accelerated motion, and describe how balanced and unbalanced forces act to cause these states of motion.

Newton's first law of motion says that an object in motion will stay in motion and an object at

rest will stay at rest unless acted on by an unbalanced force.

• An object will not change its motion unless a force acts on it.

• An object that is not moving remains at rest until something pushes or pulls it.

• An object that is moving remains moving until something pushes or pulls it.

• All objects resist having their motion changed.• This tendency to resist a change in motion is called

inertia.• The more mass an object has, the greater its inertia.

The second law of motion states that the force of an object is equal to its mass

times its acceleration.

• A change in motion occurs only if a net force is exerted on an object.• A net force changes the velocity of the object, and causes it to accelerate.• If an object is acted upon by a net force, the change in velocity will be in

the direction of the net force.• The acceleration of an object depends on its mass.• The more mass an object has or the more inertia it has, the harder it is to

accelerate.• More mass means less acceleration if the force acting on the objects is the

same.

Newton's third law of motion states that for every action there is an equal and

opposite reaction.

• When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.

• The force exerted by the first object is the action force.

• The force exerted by the second object is the reaction force.

http://www.youtube.com/watch?v=UFAGCTDB7EY&feature=player_detailpage#t=63s

Law #1 Experiments

• Bouncing Ball

• Need a Student Volunteer Please

Law #1 Experiment

• Swinging Pendulum

• Need a Student Volunteer Please

Experiment #3

• Find a partner• Each grab one side of the rope• Without getting “silly” see who is the

strongest

Tug-of-War

Which law of motion did you observe while playing Tug-of-War?

•ALL THREE

Tug-of-War

The First Law:• There frequently comes a point in tug of war sometimes right at the beginning but

sometimes later where neither side is moving. Both sides are pulling with the same force and therefore the rope does not accelerate in either direction.

The Second Law• Once a net force is applied, such as when one person begins pulling a bit harder than the

other, an acceleration begins. The person losing ground must then try to exert more force. When the net force begins going in their direction, the acceleration is in their direction. The movement of the rope slows down until it stops and, if they maintain a higher net force, it begins moving back in their direction.

The Third Law:• When you pull on that rope, you can feel that the rope is also pulling on you, trying to move

you toward the other end. You plant your feet firmly in the ground, and the ground actually pushes back on you, helping you to resist the pull of the rope.

CRAYON PHYSICS

• Please open the Crayon Physics game on your computer.

• You will be using the laws of motion you have learned today to try and complete each level

Crayon Physics

• Now that you have finished playing for today, please know that you will be able to play this game during free play and before and after school.

• Mr. Bosley and myself will try and schedule more class time to explore this site if you wish.

• Now please complete your exit pass and prepare for your next class.

Work Sited• gods martials arts. N.p., n.d. Web. 11 Apr. 2012.

<http://www.godsmartialarts.com/html/articles/laws_of_motion.pdf>.

• physics4kids. N.p., 2012. Web. 11 Apr. 2012. <http://www.physics4kids.com/ files/motion_laws.html>.

• Science-class.net. N.p., n.d. Web. 11 Apr. 2012. <http://www.science-class.net/Lessons/Physics/Force_Motion/ Newton_project.pdf>.

• "Sir Isaac Newton." About.com. N.p., 2012. Web. 11 Apr. 2012. <http://physics.about.com/od/sirisaacnewton/p/newton.htm>.

• You Tube. N.p., 2009. Web. 11 Apr. 2012. <http://www.youtube.com/ watch?v=UFAGCTDB7EY>.