Newton’s Three Laws of Motion Write Newton’s three Laws of motion in your notes. Leave room under each to add additional notes. You should already have the first one. Objective(s)/SWBAT (Students will be able to): State Newton’s 2nd law of motion State Newton’s 3rd law of motion Activities: Newton’s 2nd law Discuss proportionality F=mA, f=Ma etc. Pull a cart down the call with a constant force. Newton’s 3rd law Demonstrate collisions relate to the 2nd law throw a bowling ball while standing on a cart. Closure: Quick quizo What causes a ball to roll down an incline? Assessment: Test Keystones: 3.2.B

Today Students will be able to: Cite Newton’s 1st Law of motion Cite Newton’s 2nd Law of motion Cite Newton’s 3rd Law of motion Keystones: 3.2.B

Newton’s First Law An object at rest remains at rest and an object in motion remains in motion unless acted on by an external, unbalanced force. Inertia Drop eggs in water before stating the first law. Demonstrate with bowling ball and ping pong ball Hover puck Take the hover craft to the hall Keystones: 3.2.B

Newton’s Second Law The acceleration of an object is inversely proportional to its mass and directly proportional to the net unbalanced force acting on it. a  1/m a  F F=ma F=ma Use bowling ball and ping pong ball again. Apply a constant force to a cart and watch it accelerate. Keystones: 3.2.B

Newton’s Third Law For every action there is an equal but opposite reaction. Action-Reaction Show collisions with force sensors and carts Try throwing a bowling ball while standing on a cart Keystones: 3.2.B

The Acceleration Due to Gravity Galileo investigated the motion of falling objects. Read about Galileo’s experiments on pages 96 – 99. He was called the father of science because he believed that experimental results were needed to prove an idea. Drop objects Keystones: 3.2.B