Build a Prototype: Phase 2

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 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 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=1/2mv2; unit: Joules (J)

Build a Prototype – Phase 2: Effect of Type of Pulley on Force Instructions

Record GPE and KE

Vocabulary 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 MOTION Distance-Time

GraphsGraph 1

Graph 2

Graph 3

Graph 4

DESCRIBING MOTION Distance-Time

GraphsGraph 5

Graph 6

Graph 7

Graph 8