# Do Now- 1. Look at this picture, what kind of action is she using? 2. The woman is exerting a force. What does exertion mean? 3. Are you exerting a force.

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Do Now- 1. Look at this picture, what kind of action is she using? 2. The woman is exerting a force. What does exertion mean? 3. Are you exerting a force when you: a. use a pencil to write with? b. stand up?

Do Now- 1. Look at this picture, what kind of action is she using? 2. The woman is exerting a force. What does exertion mean? She is using a force. A force is a push or a pull. Exertion means to make an effort on something you do.

3. Are you exerting a force when you: a. use a pencil to write with? b. stand up? yes

Do Now 1. The bunny exerts force when he ___ his feet down on to the rug as he chases the cat. 2. The cat exerts force as she ___ on the box with her paw to get her body in.

1. The bunny exerts force when he ___ his feet down on to the rug as he chases the cat. pushes

2. The cat exerts force as she ___ on the box with her paw to get her body in. pulls

Do Now 1. In a free body diagram, a square represents a person or an ___ that is exerting the force. 2. Up to a maximum of four forces which are represented by ___, can exert force on the same object. 3. Each square must be labeled and also each arrow must be labeled a specific direction and ___. object arrows force

gravity and forces http://www.neok12.com/php/watch.php?v=zX5e6c5 8056e686d02660767&t=Types-of-Forces

Magnetic force http://www.neok12.com/php/watch.php?v=zX5 e757c41706a4c05184177&t=Types-of-Forces

1.A person or an action which directly _______ or pulls on a system. Example: A man tugs down on his tie. pushes Applied Force

2.It is the _______ force that is in contact with another _______ object. Example: The teacher is standing. support stable Normal Force

3.It is force exerted or ____ by a ______ as an object moves across it. Example: A player slides to home plate. used surface Frictional Force -two properties: -it must create heat -it must slow the object down

4.it is the _____ observed to oppose the _______ of an object that travels through the ___. Example: A bird flaps his wings to fly up. force motion air Air Resistance Force

5.The force from a __________ etc, when it is pulled tight by forces acting from ________ ends. Example: The phone pole on the left is attached to a cable that is anchored to the ground. cable, string, opposite Tensile Force aka Tension

6.The force that comes from a ___________ or stretched spring where the object is ___________ to. Example: A slingshot is used to shoot the lighted ceiling. Spring Force compressed attached

7.The _________ Force on an object produced by the surrounding ___________. Examples: Cheerios in milk Buoyant Force upward fluid

Types of Long Range Forces 8.The force of an ____________ or repulsive interaction betw any two ___________ Particles. X Electrical Force attractive charged

9.A ___________ field exerts a force on a single moving ___________. X Magnetic Force magnetic charge

10.It is the ____________ that the Earth has to pull down to its center. Example: The bouncing ball drops down to the floor. Gravitational Force force

Do Now Draw a free body diagram: 1. An egg is dropped from its nest. 2. A grocery bag rests on a table. (slide 6) 3. A hockey puck is gliding to the left and slowing down. (slide 17) 4. A horse pulls a sleigh to the right. (slide 10)

#1 An egg is dropped from its nest. egg F air

#2 A grocery bag rests on a table. (slide 6) bag F norm

#3 A hockey puck is gliding to the left and slowing down. (slide 17) Hockey puck F norm F frict

#4 A horse pulls a sleigh to the right. (slide 10) sleigh F norm F frict F app

http://www.wisc- online.com/Objects/ViewObject.aspx?ID=TP150 2

Do Now Draw a free body diagram by watching the video: 1. a dog is walked by her owner on my right side 2. a skier goes downhill to my left 3. people raft west of a river

1. a dog is walked by her owner on my right side

F app F frict dog F norm

1. A skier goes downhill to my left

2. Skiing downhill skier F norm F app F frict or F air F grav

2. Rafting west of a river

2. Rafting trip raft F buoy F app F air F grav

Do Now Write a free body diagram for the magazine clippings. 1. Two girls riding to the left. 2. A man surfing to the east.

1. Two girls riding to the left. bike F norm F app F air or F frict F grav

2. A man surfing to the east. If he was kite flying… surfer F buoy F air or F frict F app F grav F tens

bicyclists

Choose two pictures from a magazine. No computer printouts or drawings. Cut each picture into a square. Identify your square. Find out which three forces act on the picture. Then draw three arrows and label each force. Your cut and paste project should now look like a free body diagram. Repeat the same instructions for your second picture. Make sure none of the forces are repeated for both pictures. On back of the paper, write the forces that are exerted.

1. Cut out two pictures from magazines 2. Label each picture with three forces and arrows. 3. None of the forces should be repeated. 4. On the back of the paper, explain the forces you chose. Bikers Or bikes

Choose three pictures from a magazine. No computer printouts or drawings. Cut each picture into a square. Identify your square. Find out which two forces act on the picture. Then draw two arrows and label each force. Your cut and paste project should now look like a free body diagram. Repeat the same instructions for your second and third picture. One force can only be repeated once in all three pictures. The remaining seven forces can only be used once.

1. Cut out three pictures from magazines 2. Label each picture with two forces and arrows. 3. You may only repeat one force. Bikes or bikers

Reflections date Did the word problems on Forces prepare you for the Free Body Diagram Project? Explain.

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