How Long Can You Balance a Pencil?

Equilibrium.

 

Finding the Center of Mass...achusetts

A cutout of Massachusetts is hung in several orientations and a line is drawn straight downwards. The lines intersect at the center of mass.

 

Hewitt-Drew-it! 63. Buoyancy Problems

Problem solving with buoyancy is investigated.

 

Hewitt-Drew-it! 41.Torques on a Plank

Torques on horizontal planks, taking center of gravity into account, are examined.

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Hewitt-Drew-it! 40.Balanced Torques

We drop in on Paul's class as he discusses balanced metersticks and seesaws.

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Hewitt-Drew-it! 6. Force Vector Diagrams

Paul extends Jim Court diagrams, identifying forces on a suspended, then falling ball.

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Hewitt-Drew-it! 5. Nellie hanging on Gym Ropes

Paul shows two different ways of solving vector problems; resolution of vectors and the parallelogram method. Paul also shows a pulley problem.

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Hewitt-Drew-it! 4: Nellie's Rope Tensions

Paul Hewitt explains how vectors are used to figure out forces and equilibrium. Paul uses a parallelogram rule to find resultant tensions.

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Hewitt-Drew-it! 3:Net Force & Vectors

Paul Hewitt explains how vectors are used to figure out forces and equilibrium.

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Hewitt-Drew-it! 1: Equilibrium Rule

Paul G.Hewitt (author of "Conceptual Physics") explains equilibrium by drawings so everyone can understand the topic. This is the first in a series.

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