A 53-kg child riding a Ferris wheel (radius = 14 m) travels in a vertical circle. The wheel completes one revolution every 20 s. What is the magnitude of the force on the child by the seat (i.e. normal force) at the lowest point on the circular path?

Problem 6: A car with mass m = 1000 kg is traveling around a circular curve of radius r = 840 m when it begins to rain. The coefficients of static friction between the road and tires is ug = 0.63 when dry and uw = 0.29 when wet.

A toy airplane with a mass of exactly 0.200 kg is tied to a 1.50 m string. The other end of the string is attached to the ceiling. The toy airplane is moving in a horizontal circle with a constant speed, v. The angle θ between the string and the vertical direction is 30.0◦. (a) What is the tension in the string? (b) Given that this is Uniform Circular Motion, ?nd the tangential velocity of the toy airplane, v.

A stone that is connected to a string is being rotated horizontally. The stone completes one full circle every second; and the magnitude of the tension in the string is F-. What happens to the tension in the string if the stone speeds up such that it goes around the circle twice every second while the radius stays the same. O The magnitude of the tension increases to twice its original value. O The magnitude of the tension increases to four times its original value. O The magnitude of the tension reduces to one-fourth of its original value. O The magnitude of the tension is unchanged. O The magnitude of the tension reduces to half of its original value.