17. [-/10 Points] DETAILS SERPSE10 5.8.OP.032. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 22.0-kg block is initially at rest on a horizontal surface. A horizontal force of 78.0 N is required to set the block in motion, after which a horizontal force of 62.0 N is required to keep the block moving with constant speed. (a) Find the coefficient of static friction between the block and the surface. (b) Find the coefficient of kinetic friction between the block and the surface. Need Help? Read It Watch It 18. [-/10 Points] DETAILS SERPSE10 5.8.OP.034. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A woman at an airport is towing her 17.0 kg suitcase at constant speed by pulling on a strap at an angle 0 above the horizontal (see figure). She pulls on the strap with a 36.5 N force, and the friction force on the suitcase is 20.0 N. (a) Draw a free-body diagram of the suitcase. This answer has not been graded yet. (b) What angle does the strap make with the horizontal (in degrees)? (c) What is the magnitude of the normal force that the ground exerts on the suitcase (in N)? (d) What If? If the woman still pulls on the strap with a 36.5 N force but wishes to accelerate the suitcase at a rate of 0.500 m/s2, at what angle (in degrees) must she pull on the strap? Assume that the rolling friction is independent of the angle of the strap. (e) What is the maximum acceleration of the suitcase if the woman can exert a maximum force of 36.5 N? (Enter the magnitude in m/s2.) m/s2 Need Help? Read it Watch It19. [-/10 Points] DETAILS SERPSE10 5.8.P.034. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A block of mass 5.00 kg is pushed up against a wall by a force P that makes an angle of 8 = 50.0 angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.290. (a) Determine the possible values for the magnitude of P that allow the block to remain stationary. (If there is no maximum, enter NONE in that answer blank.) P max! " N P minl = IN (b) What happens if [P| has a larger value than IPmax|? The block slides up the wall. O The block does not slide along the wall. O The block slides down the wall. What happens if [P| has a smaller value than IP min!? O The block slides up the wall. The block does not slide along the wall. The block slides down the wall. (c) Repeat parts (a) and (b) assuming the force makes an angle of 0 = 12.2 with the horizontal. Determine the possible values for the magnitude of P that allow the block to remain stationary. (If there is no maximum, enter NONE in that answer blank.) P max! = What happens if [ P| has a larger value than |P max!? O The block slides up the wall. O The block does not slide along the wall. O The block slides down the wall. What happens if [ P] has a smaller value than IP min!? The block slides up the wall. O The block does not slide along the wall. The block slides down the wall. Need Help? Read It 20. [-/10 Points] DETAILS SERPSE10 5.8.OP.035.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 3.75-kg block starts from rest at the top of a 30.0 incline and slides a distance of 2.20 m down the incline in 1.70 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between block and plane. (c) Find the friction force acting on the block. (d) Find the speed of the block after it has slid 2.20 m. Click here to begin! Need Help? Read it 21. [-/10 Points] DETAILS SERPSE10 5.8.OP.036.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER25. [-/10 Points] DETAILS SERPSE10 5.A.OP.049.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 car accelerates down a hill (see figure below), going from rest to 23.0 m/'s in B.70 s. A toy inside the car hangs by a string from the car's ceiling. The ball in the figure represents the toy, of mass 0.590 kg. The acceleration is such that the string remains perpendicular to the ceiling. (a) Determine the angle 0. (b) Determine the tension in the string. Click here to begin! Need Help? Read It