# Circular motion question

1. Jan 30, 2006

### DB

doing a lab report on circular motion and was asked to make a combined proportionality statement, just asking yes or no, is this right?

$$F_c \propto f^{2} \propto a_c \propto \frac{1}{m} \propto r$$

where "F_c" is the centripetal force,
"f" is frequency in Hz,
"a_c" is the centripetal acceleration,
"m" is the mass in circular motion,
and "r" is the radius of the circumference of motion

is that right? does the order matter?

thanks

2. Jan 31, 2006

### andrevdh

What were the graphs that you draw (and found a directly proportional relationship)? How did you measure $a_c$ as a matter of interest?

3. Feb 1, 2006

### DB

nvrm, the it is $$F \propto f^2mr$$

thanks tho