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Atwood’s Machine Apparatus for physical science and physics is an economy choice Atwood’s machine that successfully measures acceleration due to gravity. The results are unforgettable.

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Finally! An inexpensive Atwood’s machine that successfully measures the acceleration due to gravity. It’s also a perfect device to effectively teach Newton’s second law of motion, friction, rotational inertia and measurement accuracy. Simply hang two slightly different masses over the Atwood’s machine’s pulleys and time how long it takes the heavier mass to fall a certain distance. The slower rate of descent makes it much easier to time the falling mass than an ordinary gravity drop experiment. No need for a photogate timer. A simple equation allows you to calculate the acceleration due to gravity from time and distance of descent. Students can also easily measure the amount of friction to achieve more accurate results. Pulley cord and detailed instructions are provided. Requires two slotted weight hangers, slotted weight set, stop watch, support stand and clamp holder.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Analyzing and interpreting data
Using mathematics and computational thinking
Developing and using models

Disciplinary Core Ideas

MS-PS2.B: Types of Interactions
HS-PS2.A: Forces and Motion
HS-PS2.B: Types of Interactions

Crosscutting Concepts

Systems and system models

Performance Expectations

HS-PS1-8: Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.