Example 7.7: What is the angular speed of the yo-yo in Fig. 7.10 if the string is 40 cm long? What is the tension in the string? If the string is shortened, how do the speed, tension, and acceleration change?
Whirlygig demo: Why does the spinning mass speed up as the string gets shorter? How will the angular speed change as the radius is doubled?
Bucket of nails: How fast do I need to swing the bucket in a vertical circle to keep the nails from falling out?
The Texas Motor Speedway has 750-ft radius turns that are banked at 24 degrees. For what speed are these turns designed? What coefficient of friction is needed to keep a race car from skidding when v = 200 mph? What G-force does the driver experience at this speed?
Example 7.14: Find the altitude required for a satellite to remain in geosynchronous orbit.Assignments: