Answer:
0.71 (c)
Step-by-step explanation:
T=seconds/# of revolutions
f (frequency)=# of revolutions/seconds
We have to find f.
T=1/f
Fc=mv^2/r
Fc=m(2πr/1/f)^2/r
19.74N=1kg*v^2/1m
19.74m^2/s^2=(2πr/1/f)^2
4.44m/s=2πr/T
2.22m/s=π1m/T
2.22s=π/T
0.706s=1/T
0.706s=1/1/f
or 0.706 (0.71)=f