Build a Prototype – Phase 2: Effect of Type of Pulley on Force  Introduction  Can a pulley reduce the amount of force required to pull up an object?

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Build a Prototype – Phase 2: Effect of Type of Pulley on Force  Introduction  Can a pulley reduce the amount of force required to pull up an object?

Build a Prototype – Phase 2: Effect of Type of Pulley on Force  Instructions  Obtain a pulley, string, spring scale, and 500g mass,  Make a table in workbook as instructed  Force, Distance, Pulley Type  Set up fixed pulley as instructed  Record Distance and Force  Return 500g mass and obtain 200g mass, C- clamp, and wooden board  Set up moveable pulley as instructed  Record Distance and Force

Vocabulary reviewVocabulary review  Work – the product of displacement and the force in the direction of the displacement the energy transferred to an object; W=Fd; unit: Joules (J)

Practice  Complete “Work” Worksheet

Recap  What happened to the force required to pull up the mass when you used the moveable pulley?  How much work did you do in each scenario?

Build a Prototype – Phase 2: Effect of Type of Pulley on Force  Instructions  Obtain a small wooden block and pad as instructed  2 m above ground  Record the following  Mass, height, speed

Practice  Complete “Potential and Kinetic Energy” Worksheet

Vocabulary reviewVocabulary review  Gravitational Potential Energy – the energy a body possesses as a result of its position in a gravitational field; GPE=mgh; unit: Joules (J)  Kinetic Energy – the energy associated with motion; the energy an object possesses because of its speed; KE=1/2mv 2 ; unit: Joules (J)

Build a Prototype – Phase 2: Effect of Type of Pulley on Force  Instructions  Record GPE and KE

Vocabulary reviewVocabulary review  Law of Conservation of Energy – energy in a closed system cannot be created or destroyed; it can be transformed from one form to another, but the total amount of energy remains constant

Quiz!!!

DESCRIBING MOTIONDESCRIBING MOTION  Distance-Time Graphs Graph 1 Graph 2 Graph 3 Graph 4

DESCRIBING MOTIONDESCRIBING MOTION  Distance-Time Graphs Graph 5 Graph 6 Graph 7 Graph 8

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