A large turntable with radius 6.00 m rotates about a foced vertical ais, making one revolution in 8.00 s. The moment of inertia of the turntable about this axis is 1200 kg - m. You stand, barefooted, at the rim of the tumtable and very slowty walk toward the center, along a radial line painted on the surface of the turntable. Your mass is 71.0 kg. Since the radius of the turntable is large, it is a good approximation to treat yourself as a point mass. Assume that you can maintain your balance by adjusting the positions of your feet You find that you can reach a point 3.00 m from the center of the turntable before your feet begin to slip. Part A What is the coeficient of static friction between the bottoms of your feet and the surface of the turntable? ? Submit Request Answer Provide Feedback

. Johnny Manziel has decided that he’s a terrible quarterback (he’s pretty mad about it) andwants to become a kicker, but he’s concerned about the shoe he has chosen to kick withand how it will impact the inertia of his leg. The moment of inertia of the lower leg andfoot about an axis through the knee joint is 0.20 kg·m2. What is the moment of inertia ofthe leg and foot about the knee joint if a 0.50 kg shoe is worn on the foot? Assume thatthe shoe’s mass is all concentrated in one point 45 cm from the knee joint.0.30 kg·m2

Lx Gi A 325-kg merry-go-round with a radius of 1.50 m is spinning counterclockwise, as viewed from above, at 4.80 rad/s. A 35.0-kg child is hanging on tightly 1.25 m from the rotation axis. Her father applies friction to the outer rim to slow the merry-go-round to a stop in 5 s. Model the merry-go-round as a solid disk, and define counterclockwise as the positive direction of rotation. How much torque t must the child's father apply? 432 T = N-m Incorrect

A small block on africtionless, horizontal surface hasa mass of 0.0250 kg. It is attachedto a massless cord passing througha hole in the surface (Fig.).The block is originally revolving ata distance of 0.300 m from the holewith an angular speed of 2.85 rad/s.The cord is then pulled from below,shortening the radius of the circle inwhich the block revolves to 0.150 m.Model the block as a particle. (a) Isthe angular momentum of the block conserved? Why or why not?(b) What is the new angular speed? (c) Find the change in kinetic energyof the block. (d) How much work was done in pulling the cord?

Greg Huegel, a Clemson All-American placekicker and former PHYS 2070 student, was nicknamed “The Grocery Store Kicker” by Dabo Swinney after being discovered as a walk on. When kicking a football, the kicker rotates his leg about the hip joint. As we proceed through this question, you will have to pull on information from past tests.  If the velocity of the tip of the kicker’s shoe is 33.5 m/s and the hip joint is 1.25 m from the tip of the shoe, what is the shoe tip’s angular velocity in rad/s?   The shoe is in contact with the initially nearly stationary 0.500 kg football for 20.0 ms. What average force is exerted on the football in Newtons to give it a velocity of 20.5 m/s?  find the maximum range of the football in meters, neglecting air resistance.

mine the angular position, angular speed, and angu- lar acceleration of the door (a) at t = 0 and (b) at t = Section 10.1 Angular Position, Velocity, and Acceleration 3.00 s. 3. During a certain time interval, the angular position W of a swinging door is described by 0 = 5.00 + 10.0t + 2.00t2, where 0 is in radians and t is in seconds. Deter-

Lara, a 50.0 kg gymnast, swings her 1.5 m long body around a bar by heroutstretched arms. What is her moment of inertia?

A merry-go-round (treat as uniform disk) with mass of 65 kg and outer radius of 3.1meters, is rotating at 6 rad/s. An initially stationary child grabs on to the outer edgeand thereafter, moves with the merry-go-round. The child has mass 25 kg. What isthe final angular velocity of the merry-go-round in rad/s?

Johnny Manziel has decided that he’s a terrible quarterback (he’s pretty mad about it) andwants to become a kicker, but he’s concerned about the shoe he has chosen to kick withand how it will impact the inertia of his leg. The moment of inertia of the lower leg andfoot about an axis through the knee joint is 0.20 kg·m2. What is the moment of inertia ofthe leg and foot about the knee joint if a 0.50 kg shoe is worn on the foot? Assume thatthe shoe’s mass is all concentrated in one point 45 cm from the knee joint

Suppose David puts a 0.60-kg rock into a sling of length1.5 m and begins whirling the rock in a nearly horizontalcircle, accelerating it from rest to a rate of 75 rpm after5.0 s. What is the torque required to achieve this feat, andwhere does the torque come from?