Investigating circular motion

INVESTIGATING CIRCULAR MOTION 11/3/04

AIM

To examine almost of the factors affecting the social movement of an object undergoing uniform street arab exercise, and and so to determine the quantitative family between the variables of pound, velocity and radius.

APPARATUS

Rubber piling Metre rule 50 gram slot masses

Glass pipage 50-gram mass carrier 50-gram slot masses Metre rule

Stopwatch muggy tape Metre rule String

THEORY

As in Jacaranda HSC wisdom Physics 2 p.54

In this audition when the rubber bung is woful in a circular motion and the string it is even to moves neither up or down a eonian radius is being maintained. For this to be true the centripetal force must equal the gravitational force hence

Mv/r = mg from this

v/r =mg/M and v ? r so as v increases so does r and vice versa.

Where

m = weed of mass carrier + masses (kg)

g = acceleration due to temperance 9.8 m/sec

M = mass of object in motion (kg)

v = instantaneous velocity of mass (m/sec)

r = radius of circular motion (m)

METHOD

As in Jacaranda HSC Science Physics 2 p.54

However quite of measuring the time for 10 revolutions, the time for 20 revolutions was measured, this allowed more accurate results to be obtained. Furthermore the lengths given in the sacred scripture were used as merely guidelines and not followed precisely as well as 50 and 100-gram masses were used.

RESULTS

Force (N)         Radius(m)         Period (20 Revolutions) (s)         Orbital Velocity v m/s         v

g x 50g         1.03         19.47         6.65         44.19

g x 50g         0.83         17.02         6.12         37.55

g x 50g         0.64         14.14         5.



68         32.35

g x 50g         0.37         9.94         5.2         27.04

g x 100g         1.06         16.86         7.9         62.41

g x 100g         0.82         14.4         7.15         48.702

g x 100g         0.62         12.8         6.08         37.01

g x 100g         0.44         10.2         5.42 ...

This seems to be a well planned and nicely documented experiment examining some of the factors affecting the motion of an object undergoing uniform circular motion. I also liked your determination of the quantitative relationship between the variables of force, velocity and radius. Of course, you only needed to submit your cut through once.

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