A plumb-bob hangs from the roof of a railroad car. The car travels around a circular track of radius 228 m at a speed of 63 km/h. At what angle from the vertical does the plumb bob hang while the car travels around the circular track?
A wind turbine is rotating at 0.500 rev/s and slows to a stop in 10.0 s. Its blades are 20.0 m in length.
What is the angular acceleration of the turbine?
What is the centripetal acceleration of the tip of the blades at ?
The driver of a car moving at 90.0 km/h presses down on the brake as the car enters a circular curve of radius 150.0 m. If the speed of the car is decreasing at a rate of 9.0 km/h each second, what is the magnitude of the acceleration of the car at the instant its speed is 60.0 km/h?