Make a list of what you know about Simple Machines?

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Presentation transcript:

Make a list of what you know about Simple Machines? Activator Make a list of what you know about Simple Machines?

Simple Machines and Work SPS8. Students will determine relationships among force, mass, and motion. e. Calculate amounts of work and mechanical advantage using simple machines.

Simple Machines An unpowered mechanical device that reduces the amount of effort we have to put into the machine to move something. Make work easier by Redirecting a force Multiplying a force Both redirecting and multiplying a force

Simple Machines Examples Pulley Lever Inclined plane Wheel and axle Wedge Screw Screw

Mechanical Advantage The amount a machine multiplies our effort put into a machine. Formula MA = Fr = de Fe dr MA = Forceresistance Forceeffort MA = distanceeffort distanceresistance

Mechanical Advantage

Effort the force you apply to the simple machine or the distance you apply the force on the simple machine

Effort

Resistance the weight the machine moves for you or the distance the machine moves an object for you

Resistance

Work A force is applied to an object and the object moves in the direction of the force. W = F x d

Work Which of the following is work? You pick up a 10 N book and lift it 1 m. You hold the book and walk with it for a distance of 10 m.

Summary What does a simple machine do for you?

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