1:17 7. [-/10 Points] DETAILS SERPSE10 6.2.OP.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A roller-coaster car has a mass of 514 kg when fully loaded with passengers. The path of the coaster from its initial point shown in the figure to point 8 involves only up-and-down motion (as seen by the riders), with no motion to the left or right. Assume the roller-coaster tracks at points @ and Bare parts of vertical circles of radius , = 10.0 m and r2 = 15.0 m, respectively. (a) If the vehicle has a speed of 19.9 m/s at point @, what is the force exerted by the track on the car at this point? N (b) What is the maximum speed the vehicle can have at @ and still remain on the track? m/s Need Help? Read It Watch It 8. [-/10 Points] DETAILS SERPSE10 6.2.P.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. Each vertical loop, instead of being circular, is shaped like a teardrop. The cars ride on the inside of the loop at the top, and the speeds are fast enough to ensure that the cars remain on the track. The biggest loop is 40.0 m high. Suppose the speed at the top is 12.9 m/s and the corresponding centripetal acceleration is 2g. (a) What is the radius of the arc of the teardrop at the top? m (b) If the total mass of a car plus the riders is M, what force does the rail exert on the car at the top? O 2Mg (down) OM(v2/r + 29) (down) O 2Mg (up) O Mg (down) OM(v2/r + 29) (up) O Mg (up) (c) Suppose the roller coaster had a circular loop of radius 17.3 m. If the cars have the same speed, 12.9 m/'s at the top, what is the centripetal acceleration at the top? m/s2 (d) Comment on the normal force at the top in the situation described in part (c) and on the advantages of having teardrop-shaped loops. This answer has not been graded yet. Need Help? Read It 9. [-/10 Points] DETAILS SERPSE10 6.3.OP.013.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 An object of mass m = 0.525 kg is suspended from the ceiling of an accelerating truck as in the figure below. Take a = 2.90 m/s2. webassign.net1:17 9. [-/10 Points] DETAILS SERPSE10 6.3.OP.013.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 An object of mass m = 0.525 kg is suspended from the ceiling of an accelerating truck as in the figure below. Take a = 2.90 m/s2. Tel Inertial *mg observer OF O (a) Find the angle 8 that the string makes with the vertical. (b) Find the tension 7 in the string. Click here to begin! Need Help? Read It 10. [-/10 Points] DETAILS SERPSE10 6.3.P.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An object of mass m = 5.35 kg, attached to a spring scale, rests on a frictionless, horizontal surface as in the figure below. The spring scale, attached to the front end of a boxcar, reads zero when the car is at rest. (a) Determine the acceleration of the car if the spring scale has a constant reading of 18.9 N when the car is in motion. m/s to the right b) What constant reading will the spring scale show if the car moves with constant velocity? IN (c) Describe the forces on the object as observed by someone in the car. This answer has not been graded yet. (d) Describe the forces on the object as observed by someone at rest outside the car. This answer has not been graded yet. Need Help? Read It 11. [-/10 Points] DETAILS SERPSE10 6.3.P.015.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER webassign.net