A 2.0 kg mass attached to a 1.5 m string is being spun in a vertical circle at a constant speed. When the mass is at its highest point in the circle the tension in the string is 7.4 N. What is the speed of the mass?

A curve in a stretch of highway has radius 512 m. The road is unbanked. The coefficient of static friction between the tires and road is 0.700. What is the maximum safe speed that a car can travel around the curve without skidding?

A skater is trying to perform a Triple revolution jump. His vertical take off speed is 2.8 m/s. How fast does he need to rotate to complete the triple revolution in the air? (in rotation per second) Assuming g=9.8 m/s² Your Answer: Answer

A jet pilot flies his aircraft in a vertical loop at a speed of 1200 km/h.   Part A What is the minimum radius of the circle (in meters) such that the pilot experiences no more than 6.0 g of centripetal acceleration when at the bottom of the loop? Part B The pilot has a mass of 78 kg. What is his effective weight at the bottom of the loop? Part C The pilot has a mass of 78 kg. What is his effective weight at the top of the loop? (Assume the same speed.)

The passengers in a roller coaster feel 42 % heavier than their true weight as the car goes through a loop with a 30 m radius of curvature.  What is the car's speed at the bottom of the loop?  Use g = 10 N/kg.  Hint:  How heavy some one feels is another name for normal force.  The problem therefore tells you the normal force.  If you know weight and normal force, you can determine centripetal acceleration.  You can substitute a value for mass if you wish.

NASA uses a machine often called the "vomit comet" to mimic the effects of low gravity in space during astronaut training. The machine moves in circular arcs at a speed of v = 214 m/s. What is the radius the pilot must fly to create weightlessness as they go around the top of the circular arc? Give your answer in meters.

A ball is on the end of a string. The ball is being swung in a vertical circle at a constant speed.The length of the string is 1.30 m. The mass of the ball is 2.10 kg. The maximum tension the string can withstand before breaking is 54.0 N.What is the maximum speed of the ball without the string breaking when the ball is at the top of the circle (Point A in the figure)?

A small object of mass 0.500 kg is attached by a 0.830 m-long cord to a pin set into the surface of a frictionless table top. The object moves in a circle on the horizontal surface with a speed of 7.54 m/s. a.)What is the magnitude of the radial acceleration of the object?  b.)What is the tension in the cord?