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Consider a conical pendulum with a bob of mass m = 76.0 kg on a string of length L = 10.0 m that makes an angle of 9 = 2.00 with the vertical. (Consider +i to be towards the center of the circular path and +j to be upward.) 7-H Ei_____ S | \\J' (D (a) Determine the horizontal and vertical components of the force exerted by the string on the pendulum. :l N i + :l N: (b) Determine the radial acceleration of the bob. Em? A coin placed 30.6 cm from the center of a rotating, horizontal turntable slips when its speed is 48.6 cm/s. (a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable? 0 static friction O inertia O kinetic friction O centrifugal force (b) What is the coefficient of static friction between coin and turntable? :l Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 209 km above the surface of the Moon, where the acceleration due to gravity is 1.35 m/s2. The radius of the Moon is 1.70 x 10 m. (a) Determine the astronaut's orbital speed. m/s (b) Determine the period of the orbit. SA light string can support a stationary hanging load of 26.6 kg before breaking. An object of mass m = 2.81 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.811 m, and the other end of the string is held fixed as in the figure below. What range of speeds can the object have before the string breaks? 05v5|:]m/s