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Q2 and Q3 please, thanks

1. An object is traveling in a circle with a radius of 2 m at a frequency of 3 Hz. What is its period?
rod12
2=
2. What's the net force on a 2 kg mass spinning in a circle with a 1.50 m radius at a frequency of 4
Hz?
3. A car traveling at a speed of 30 m/s rounds a flat curve whose radius is 185 m. Find the
coefficient of friction between the tires and the road?

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