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course Phy 121
This submit work form is just to verify that I viewed and manipulated the asst 30 PHeT lab 9.6 and 10.7. Thanks.
I did view PHeT 9.6 and 10.7 on torque and angular rotation.It was interesting to slide the ladybug closer and further away from the center of rotation and note the differences in velocity and acceleration. The further the ladybug is from the center of rotation the higher the velocity and angular acceleration are. It is also note worthy that even thought the angular speed is set, a different position from the center of rotation will change the lady bug v and a.
I also did some trials on how fast the wheel needed to be spinning to ‘throw’ the lady bug off the wheel. Positioned near the center at about 4000 degrees/s the bug flew off the wheel. Positioned on the outer edge at about 2000 degrees/s the bug flew off the wheel.
The ‘throw the bug off the wheel’ observations make sense in the fact that we know force equals mass times acceleration. At the outer edge of the wheel acceleration centripetal is higher faster due to the v^2/r =|aCent|. We observed that the velocity at the outer wheel is much higher than the inner wheel at the same angular speed.
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Very good.
Thanks.
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