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Presentation transcript:

Happy Tuesday! Login to SOCRATIVE first. Then set up today’s pages! Today you are adding FOUR pages for your study guide answers and TWO pages (like normal) for your notes. Make sure you FOLD your study guide before you glue it in. Please help me in making sure your neighbors read the board like you just did! Thanks you my classroom LEADers!

APK

EQ: How can a lever be used to reduce the amount of force to do work? Listen to me read the EQ. Please whisper the EQ to me. Please whisper the EQ to your neighbor. Let’s all say our EQ together.

Lesson Importance: WHY? Why do you need to know how a lever can be used to reduce the amount of force needed to do work? Think…. Tell your group your answer. Type your answer into Socrative.

Guided Practice: Simple Machines reduce the amount of effort/force needed to do work. Levers: A lever is a rigid bar that is free to move around a fixed point, called a fulcrum. The fulcrum may be placed anywhere under the lever.

Please type in your answer into Socrative. What is a lever? A) a rigid bar that is free to move around a fixed point, called a fulcrum. B) a moveable bar that cannot move around a fixed point, called a fulcrum. C) a rigid bar that cannot move around a fixed point, called a fulcrum D) a moveable bar that is free to move around a fixed point, called a fulcrum

Forces Input force: the force pushing down on the lever Output force: the force lifting the load on the lever Copy diagram & labels

Lever reduces the amount of FORCE by: 1) Increase the distance between the fulcrum & where the effort force/input force is applied OR 2) Decrease the distance of the weight from the fulcrum

STOP What are on of the two ways levers reduce the amount of FORCE? Write one of them on your iPad.

The farther the force is from the fulcrum, the easier it is to work the lever. A lever changes the direction as well as the amount of force

STOP: Question Time What two things does a lever change? A) Size and speed B) Force and effort C) Direction and amount of force D) Direction and speed

Close: Answer on your board Let’s review with this video… https://www.youtube.com/watch?v=YlYEi0PgG1g

Independent Practice: DO on your I-pad. Draw a lever and a fulcrum and a load/weight. Label the lever, the fulcrum, & the load/weight. Label the input force and output force.

Study Guide Answers 1. when a force is applied to an object and the object moves a distance 2. measures force in Newtons (N) or weight in grams (G) or pounds (lbs) 3. Newtons (N) or grams (G)/pounds (lbs)