Work And Simple Machines

What is work? ,[object Object],[object Object]

Work or Not? ,[object Object],[object Object],[object Object]

What’s work? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Formula for work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

W=FD ,[object Object],[object Object]

W=FD ,[object Object],[object Object],[object Object]

Power ,[object Object],[object Object],[object Object],[object Object]

Check for Understanding 1. Two physics students, Ben and Bonnie, are in the weightlifting room. Bonnie lifts the 50 kg barbell over her head (approximately .60 m) 10 times in one minute; Ben lifts the 50 kg barbell the same distance over his head 10 times in 10 seconds. Which student does the most work? Which student delivers the most power? Explain your answers.

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

History of Work ,[object Object]

Simple Machines ,[object Object]

Simple Machines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Lever Family The Wedge Family

Simple Machines ,[object Object],[object Object],[object Object],[object Object],[object Object]

Mechanical Advantage ,[object Object],[object Object]

Mechanical Advantage ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Lever ,[object Object],[object Object],[object Object]

The 3 Classes of Levers ,[object Object]

First Class Lever ,[object Object],[object Object],[object Object]

Fulcrum is between EF (effort) and RF (load) Effort moves farther than Resistance. Multiplies EF and changes its direction

Second Class Lever ,[object Object],[object Object],[object Object]

RF (load) is between fulcrum and EF Effort moves farther than Resistance. Multiplies EF, but does not change its direction

Third Class Lever ,[object Object],[object Object],[object Object]

EF is between fulcrum and RF (load) Does not multiply force Resistance moves farther than Effort. Multiplies the distance the effort force travels

Wheel and Axle ,[object Object],[object Object]

Pulley ,[object Object],[object Object],[object Object],[object Object],[object Object]

Inclined Plane ,[object Object]

Inclined Plane ,[object Object],[object Object]

Wedge ,[object Object],[object Object],[object Object]

Screw ,[object Object],[object Object]

Efficiency ,[object Object],[object Object],[object Object],[object Object],[object Object]

Calculating Efficiency ,[object Object],[object Object],[object Object],[object Object]

Work And Simple Machines

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Work And Simple Machines