1. [-/10 Points] DETAILS SERPSE10 6.1.OP.001.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise A light string can support a stationary hanging load of 23.7 kg before breaking. An object of mass m = 3.20 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius / = 0.776 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? Click here to begin! Need Help? Read It 2. [-/10 Points] DETAILS SERPSE10 6.1.OP.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Consider a conical pendulum with a bob of mass m = 85.0 kg on a string of length 4 = 10.0 m that makes an angle of 0 = 4.00 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/s2 Need Help? Read It Watch It 3. [-/10 Points] DETAILS SERPSE10 6.1.P.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 203 m, and the car completes the turn in 40.0 s. 35.0 C (a) What is the acceleration when the car is at B located at an angle of 35.09? Express your answer in terms of the unit vectors i and j. m/s2 i + m/s2 j (b) Determine the car's average speed. m/s (c) Determine its average acceleration during the 40.0-s interval. m/s2 i + m/s2 j4. [-/10 Points] DETAILS SERPSE10 6.1.OP.004.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise A coin placed r = 30.7 cm from the center of a rotating, horizontal turntable slips when its speed is 51.7 cm/s. (a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable? (b) What is the coefficient of static friction between coin and turntable? Click here to begin! Need Help? Read It 5. [-/10 Points] DETAILS SERPSE10 6.1.P.007.CTX. MY NOTES ASK YOUR TEACHER You are working during your summer break as an amusement park ride operator. The ride you are controlling consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the floor drops away (see the figure below). The coefficient of static friction between a person of mass m and the wall is #, and the radius of the cylinder is R. You are rotating the ride with an angular speed @ suggested by your supervisor. (a) Suppose a very heavy person enters the ride. Do you need to increase the angular speed so that this person will not slide down the wall? Yes O No (b) Suppose someone enters the ride wearing a very slippery satin workout outfit. In this case, do you need to increase the angular speed so that this person will not slide down the wall? Yes O No Need Help? Read It 6. [-/10 Points] DETAILS SERPSE10 6.2.P.010.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise A 38.0-kg child swings in a swing supported by two chains, each 2.91 m long. The tension in each chain at the lowest point is 349 N. (a) Find the child's speed at the lowest point. (b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.) Click here to begin! Need Help? Read It