A solid sphere of radius R rolls without slipping in a trough of radius 5R as shown to the right. Answer the following questions: 5R, a. At what point(s) in the sphere's motion does it have zero R centripetal acceleration? What is the direction of the acceleration vector at this point? b. At what point(s) in the sphere's motion does it have zero tangential acceleration? What is the direction of the acceleration at this point? c. Explain why the period of the oscillation for the solid sphere is independent of the mass of the solid sphere.

A large wind turbine (typical of the size and specifications of a turbine that you see in a modern wind farm) has three blades connected to a central hub. The blades are 50 m long and rotate at 10 rpm. What angular speed ω and angular acceleration at the tip of a blade?

A particular DVD player has an operational angular velocity of 2500 rpm. We model thespinning DVD as a disk (I = 0.5 mr^2) with radius r = 0.1m, m = 40 g. A) What is the centripetal acceleration of a point on the edge of the DVD when it is spinningat operational speed? What is the tangential velocity of this point?   B) We turn off the DVD player and notice it takes 3 seconds for the DVD to stop spinningdue to kinetic friction. What is the angular acceleration of the DVD? How many rotations does theDVD make before it stops?   C) If we model the total kinetic friction force acting on the DVD as acting on a point r = 0.05m from the center of the disk, pointing in the direction opposite of the motion at this point, then whatis the coefficient of kinetic friction between the disk and the disk tray?

page A person 1.56 m tall swings their leg from the hip at 1.51 radians/s. Calculate the linear tangential velocity (v) at their knee to 2 decimal places. Answer. re to search 561 R T 6 B N U 8 O Pa Next page d Construction on A20...