Does the gravitational field affect the angle at which the object “slips” at constant friction coefficient? Explain why or why not. What physical quantities are affected by the change in gravitational field?

A 2000 kg roller coaster car is traveling upside down at 18 m/s as passes the top of a 24 m radius loop. Determine the force that the roller coaster car exerts on the track of the loop at this point.

Current Attempt in Progress The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle ((r= 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.520, and the angle in the drawing is 7.45°. How much time is required for your suitcase to go around once? Assumme that the static friction between the suitcase and the carousel is at its maximum. Number Units

Disturbed by speeding cars outside his workplace, Nobel laureate Arthur Holly Compton designed a speed bump (called the "Holly hump") and had it installed. Suppose a 1800-kg car passes over a hump in a roadway that follows the arc of a circle of radius 22.0 m as in the figure below. If the car travels at 27.4 km/h what force does the road exert on the car as the car passes the highest point of the hump?  What is the maximum speed the car can have without losing contact with the road as it passes this highest point?