2) An 1750 g block is suspended by a string that is wrapped around a 22.0 cm diameter rotating cylindrical disk. The block is released from rest and drops a distance of 2.50 m in 1.77 seconds. (a) Draw diagrams of the forces and torques acting on the block and the disk. (b) Find the rotational acceleration of the disk. (C) Calculate the rotational inertia of the disk. (d) Find the mass of the disk. (e) Calculate the number of rotations made by the disk during the drop.

The moment of inertia of an object about a certain axis is 1.2 kg-m2. Initially the object is at rest, and then it is accelerated at a constant rate of 25 rad-s-2. Determine the time required for the object to achieve a rotational kinetic energy of 1.50 kJ.

1. An Olympic athlete competing in the hammer toss spins the 7.26 kg hammer in a circle having a radius of 2.15 m (this includes both the length of the massless cable attached to the hammer and the athlete's arms). If the angular speed of the hammer is 13.4 rad/s about the axis of rotation just before the athlete releases the hammer, what is the tension force in the cable attached to the hammer at this moment? Treat the hammer like it is a point mass at the end of a massless cable. 2. Your car has a mass of 1.30 x 103 kg. You get on Crondall Lane and are cruising along at 20.0 m/s and thinking about how you really should have walked across the bridge instead of contributing to global pollution. You look up to see that you are approaching the stoplight at Owings Mills Boulevard and it is red, so you slam on the brakes when you are 25.0 m away from the light. If your brakes provide a constant force of 8.90 x 103 N, do you stop before reaching the stoplight? If not, how fast are you…

A bicycle wheel, of mass 1.52 kg is placed at the end of a rod 0.630 m in length, which can pivot freely about the other end. D- The rod is of negligble mass. The wheel is turning rapidly such that it has an angular momentum of 15.1 kgm2/s. At what angular speed does the wheel revolve horizontally about the pivot? Submit Answer Tries 0/10

1. In the figure below, block 1 has a mass of m1 = 450 g and block 2 has a mass of m2 = 500 g. The pulley, which is mounted on a horiztonal axle with negligible friction through its center, has a radius of 5.00 cm. When released from rest, block 2 falls without the cord slipping on the pulley, travelling 75.0 cm before it reaches a speed of 0.300 m/s. What is the rotational inertia of the pulley? m2

Consider the 15.0 kg motorcycle wheel shown in the figure. Assume it to be approximately an annular ring with an inner radius of R1 = 0.280 m and an outer radius of R2 = 0.480 m. The motorcycle is on its center stand, so that the wheel can spin freely. a)If the drive chain exerts a force of 2450 N at a radius of 5.00 cm, what is the angular acceleration of the wheel in rad/s2? _____rad/s2   (b)What is the tangential acceleration, in m/s2, of a point on the outer edge of the tire? ______m/s2   (c)How long in seconds, starting from rest, does it take to reach an angular velocity of 80.0 rad/s? _______s