PHSICS 180

1. [-/1 Points] DETAILS SERPSE10 6.1.OP.001.MI. MY NOTES A light string can support a stationary hanging load of 26.0 kg before breaking. An object of mass m = 3.23 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.785 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? OSVS m/s Need Help? Read It Master It2. [-/1 Points] DETAILS SERPSE 10 6.1.OP.003. MY NOTES Consider a conical pendulum with a bob of mass m = 71.0 kg on a string of length L = 10.0 m that makes an angle of 0 = 8.00 with the vertical. (Consider +i to be towards the center of the circular path and +j to be upward.) (a) Determine the horizontal and vertical components of the force exerted by the string on the pendulum. Ni+ Nj (b) Determine the radial acceleration of the bob. m /s 2 Need Help? Read It Watch It3. [-/1 Points] DETAILS SERPSE10 6.1.OP.004.MI. MY NOTES A coin placed 30.4 cm from the center of a rotating, horizontal turntable slips when its speed is 52.0 cm/s. a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable? O static friction O inertia O kinetic friction O centrifugal force (b) What is the coefficient of static friction between coin and turntable? Need Help? Read it Master It