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Ch 09: Work & EnergyWorksheetSee all chapters

# Net Work & Work-Energy Theorem

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Sections
Intro to Energy & Kinetic Energy
Intro to Calculating Work
Net Work & Work-Energy Theorem
Work On Inclined Planes
Work By Springs
Work As Area Under F-x Graphs
Power

Concept #1: Calculating Net Work

Practice: You pull a 3kg box on a flat surface. The coefficient of kinetic friction is 0.6. When you pull the box horizontally through a distance of 10m, it accelerates at 2m/s2. Find the net work on the box.

Practice: To pull a 51 kg crate across a rough floor, a worker applies a force of 100 N, directed 37°above the horizontal. The coefficient of friction is 0.16. If the crate moves 3.0 m, what is the total work done on the crate?

Concept #2: The Work-Energy Theorem

Practice: A box slides across the floor with an initial speed of 3.5m/s. If the coefficient of kinetic friction is 0.15, how far will the box slide before stopping completely?

Example #1: Net Work & Constant Speed