7. [-/1 Points] DETAILS SERPSE10 8.3.P.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A smooth circular hoop with a radius of 0.600 m is placed flat on the floor. A 0.425-kg particle slides around the inside edge of the hoop. The particle is given an initial speed of 9.00 m/s. After one revolution, its speed has dropped to 5.50 m/s because of friction with the floor. (a) Find the energy transformed from mechanical to internal in the particle-hoop-floor system as a result of friction in one revolution. (b) What is the total number of revolutions the particle makes before stopping? Assume the friction force remains constant during the entire motion. rev Need Help? Read It 8. [-/1 Points] DETAILS SERPSE10 8.4.OP.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A student on a skateboard is moving at a speed of 1.40 m/s at the start of a 2.20 m high and 12.4 m long incline. The total mass is 60.0 kg, air resistance and rolling resistance can be modeled as a constant friction force of 41.0 N, and the speed at the lower end of the incline is 6.10 m/s. Determine the work done (in J) by the student as the skateboard travels down the incline. Need Help? Read It 9. [-/1 Points] DETAILS SERPSE10 8.4.OP.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The coefficient of friction between the block of mass m, = 3.00 kg and the surface in the figure below is u = 0.475. The system starts from rest. What is the speed of the ball of mass m, = 5.00 kg when it has fallen a distance h = 1.55 m? m/s9. [f1 Points] DETAILS SERPSE10 8.4.0P.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The coefficient of friction between the block of mass m1 = 3.00 kg and the surface in the gure beiciw is \"k = 0.475. The system starts from rest. What is the speed of the ball of mass m2 = 5.00 kg when it has falien a distance h = 1.55 m? Em