In the cetripetal force laboratory experiment, we used an average of 15 revoluti

Question

In the cetripetal force laboratory experiment, we used an average of 15 revolutions to determine centripetal force. Part 1 involoved varying the radius and in part 2 the radius was the same we only varied the mass. Questions:

a.How woud your results have been different if you had used only one rotation? Fifty rotations?

b. What provides the centripetal force needed to keep the rotation object in a circle? Explain your answer.

Please, answers should be minimum 5 snetences long and must explain reasons fully, to be rated.

Explanation / Answer

part a:

during the measurement, precise measurement is not possible due to combination of human error, equipment limitation and other random errors.

by taking only single rotation, exact measurement of angular speed through time taken for the complete rotation could be erroneous as exact determination of start and stop point of the rotation is not error free.

by taking 15 revolutions and taking average of the total time, that error is reduced.

hence multiple observations are taken and then average of the data is being used to minimze different errors that can come up in the measurement procedure.

part b:

the tension in the string balances the centripetal force and keep the object rotating in a circle.

if mass of the object is m and length of the string is r and speed of the mass is v,

then tension in the string T=m*v^2/r

this will be true until the string reaches its breaking point .

that imposes the limit on upto what speed the mass can be rotatated.

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