lab 8- Demonstration-- Centripetial Acceleration vs. angular frequency

PurposeIn this lab, we need to determine the relationship between centripetal force, distance, mass, and angular velocity.

IntroductionCentripetal force is a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.
The equation of it is

procedure
To know how long it takes for the disk to make some number of rotations at a range of rotational speeds. We did this by using a piece of tape on the rim of the disk, passing through a photogate, to determine the rotational period of the disk. And then measure the distance of the mass from the center of the rotating disk.

Data

Analysis

Conclusion

When the radius between moving point to the center getting larger, it also requires more centripetal force. If we get more angular velocity to an object, the object need more centripetal force to rotate.

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8-May, 15-May-2017: Lab 16: Angular acceleration

Purpose: Learn the angular acceleration. Find out how the changing of hanging mass, rotating mass and the torque radius will influence on the angular acceleration. Introduction: In the angular acceleration lab, we usually use a disk. The changing of hanging mass, rotating mass and the torque radius affect on the angular acceleration. By changing one of those parameters and remaining others, we can find out how the chosen parameter will change the angular acceleration. For example, we can derive the influence of radius change by change the pulley’s size, which is made of the same material. After determining every parameters, we can finally find out how the changing of hanging mass, rotating mass and the torque radius will influence on the angular acceleration and verify it by the equation I*α=Torque where α stands for the angular acceleration. Setup: Set experiment devices as the following photo. Procedure: Measure the required parameters. Here are these para...

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Lab 8- Deriving a Model from Friction

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