1. A tire with a diameter of 60 centimeters turns at a rate of 100rpm. What is the linear speed of the car? 60cm

2. A 180 gram rubber stopper is tied to a string and swung in a vertical circle of 1.2 meters. What is the minimum velocity the mass can have and still successfully complete the circle. What would the tension in the string be if the stopper had the same velocity at the bottom of the circle?

3. The following system is in equilibrium (balanced). What is the unknown mass? 8kg ? 5kg 8m 2.5m 1.5m

4. A car rounds a circular curve of radius 40 meters. The coefficient of friction between the road and the tires is 0.8. What is the maximum speed the car can have and still successfully negotiate the curve? 40m

5. A 500kg satellite has an orbital radius of 1.5 x 10 7 meters. Calculate the linear velocity and the period of the satellite. Mass of the earth = 6.0 x 10 24 kg r = 1.5 x 10 7 m