Record in Data Table $2.$

Calculate the percent error for each trial.$$

PercentError$=|$Fg$$Fc$|$Fg$100\%$PercentError$=|$Fg$$Fc$|$Fg$100\%$

Record in Data Table $2.$

Cleanup:

Return all HOL materials to the lab kit for use in future experiments.

Exercise $1-$ Questions

Question $1$

What effect does radius have on the velocity of a rotating object?

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Question $2$

What effect does the velocity of a rotating object have on the centripetal force exerted on it$?$

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Question $3$

The Moon orbits Earth at an average distance of $3\mathrm{.}84$ x $108$ m in a path that takes $27\mathrm{.}3$ days to complete. What is the centripetal acceleration of the Moon? $($Remember$,$ you must convert time into seconds.$)$

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Question $4$

When a bucket of water is swung in a vertical circle, the water will remain in the bucket if the velocity is high enough. If you let the bucket slow down too much, the water will spill out. The critical velocity is the slowest velocity necessary to keep the water in the bucket.

What is the critical velocity if the formula is velocity $=$rgrg$,$where r is the radius $($the radius of your arm swing including the bucket$)$ and g is the acceleration of gravity $($g$=9\mathrm{.}81$ m$/$s$2)?$

Hint: You must measure or estimate the length from your shoulder to the center of the bucket to determine the radius.

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