37. A ball at the end of a string is in constant contact with a table. The ball is moving in uniform circular motion as shown in the diagram below. Table Ball String Which force causes the ball to move in uniform circular motion? A normal force on the ball by the table B. tension force on the ball by the string C. force of gravity on the ball by Earth D. force of friction on the ball by air

2) A roller coaster is going over a hill with a radius of 20 m.     a. How fast does it have to go for the passengers to feel weightless at the top? b. Suppose the roller coaster was running on the Moon, where the acceleration of gravity is only 1.7 m/s^2. How fast would it need to travel for you to feel weightless there?

14 A 1 kg ball is tied to the end of a rope and spun around in a vertical circle. The ball is slowly accelerated, spinning faster and faster, until the rope breaks. At what point in the circular motion would you expect the rope to break? Group of answer choices bottom top left right

Two balls, X and Y, are spun at a velocity of 6.5 m/s in a horizontal circle on the path shown below. Ball X has a mass of 1.3 kg, and ball Y has a mass of 0.81 kg. Which statement best describes the centripetal acceleration and centripetal forces on the balls? A. Both balls will experience equal centripetal force and centripetal acceleration. B. Ball X will experience greater centripetal force and greater centripetal acceleration. C. Ball Y will experience greater centripetal force, but ball X will experience greater centripetal acceleration. D. Both balls will experience the same centripetal acceleration, but ball X will experience greater centripetal force.