Free Body Diagrams

What is a Free Body Diagram?

• Visual representation of force

• Visual representation of objects

• Visual representation of force and objects interactions

• Visual representation of gravity

In a Free Body Diagram, individual objects or members are ___________.

• Isolated

• In their natural environment/system

• Components

• Composites

How is a force represented in a Free Body Diagram?

• A straight line with an arrowhead

• A curved line with an arrowhead

• An arc with an arrowhead

• Multiple lines with arrowheads

________________: The twisting effort about a point or axis when a force is applied at a distance.

• Force

• Moment

• Torque

• Angular Velocity

Force is a __________ quantity.

• Vector

• Scalar

Vector quantities always have ________ and __________.

• Direction and Magnitude

• Direction and Value

• Value and Units

• Angles and Numbers

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

How is Moment represented in a Free Body Diagram?

• An arc with an arrowhead

• A straight line with an arrowhead

• A curved line with an arrowhead

• Multiple lines with arrowheads

Simply Supported objects have

• One pin and one roller connection

• Gravity acting on them

• Two pins

• A cable connection and a wall connection

Tags

NGSS.MS-ETS1-1

Why are rollers used?

• They allow for expansion or compression of a bridge/beam

• Engineers are lazy and want to draw less arrows

• They make the bridge/beam more stable because it can move less

• They increase the structural integrity of the bridge/beam

Which point of the beam would be connected with a Pin?

• Point A

• Point B

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2