A grindstone in the shape of a solid disk with diameter 0.450 m and a mass of m = 50.0 kg is rotating at w = 870 rev/min. You press an ax against the rim with a normal force of F = 180 N (Figure 1), and the grindstone comes to rest in 7.70 ss. Part A Find the coefficient of friction between the ax and the grindstone. You can ignore friction in the bearing ? Submit Request Answer

An advertisement claims that a centrifuge takes up only 0.127 m of bench space but can produce a radial acceleration of 2600 g at 4700 rev/min. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Throwing a discus Part A Calculate the required radius of the centrifuge Express your answer in meters. ID ΑΣΦΑ Submit Request Answer Part B Is the claim realistic? Yes O No Submit Request Answer m

We wrap a light, nonstretching cable around a 7.00 kg solid cylinder with diameter of 40.0 cm. The cylinder rotates with negligible friction about a stationary horizontal axis. We tie the free end of the cable to a 15.0 kg block and release the block from rest. As the block falls, the cable unwinds without stretching or slipping. Part A How far will the mass have o descend to give the cylinder 540 J of kinetic energy? Express your answer in meters. h = In Submit Request Answer Provide Feedback

Part A Two metal disks, one with radius R1 = 2.40 cm and mass M = 0.900 kg and the other with radius R2 = 5.05 cm and mass M2 = 1.70 kg , are welded together and mounted on a frictionless axis through their common center. A light string is wrapped around the edge of the smaller disk and a 1.60 kg block is suspended from the free end of the string. What is the magnitude of the downward acceleration of the block after it is released? Take the free fall acceleration to be 9.80 m/s?. a = m/s? Submit Request Answer Part B Repeat the calculation of part (a), this time with the string wrapped around the edge of the larger disk. Take the free fall acceleration to be 9.80 m/s?. ? a = m/s² Submit Request Answer

a. What is the magnitude of acceleration of the block?   b. What is the magnitude of the tension force from the block on the cylinder?

I Review I Constants A 2.2 kg , 20-cm-diameter turntable rotates at 150 rpm on frictionless bearings. Two 470 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick. Part A What is the turntable's angular velocity, in rpm, just after this event? Express your answer to two significant figures and include the appropriate units. HẢ ? Value Units W = Submit Request Answer

Part A A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, as shown in the figure (see the figure (Figure 1)). The pulley is a uniform disk with mass 11.6 kg and radius 48.0 cm and turns on frictionless bearings. You measure that the stone travels a distance 12.4 m during a time interval of 3.50 s starting from rest. Find the mass of the stone. Take the free fall acceleration to be 9.80 m/s. ΑΣφ kg Submit Request Answer • Part B Find the tension in the wire. Take the free fall acceleration to be 9.80 m/s². 圈] ? Submit Request Answer Provide Feedback Figure 1 of 1 MacBook Air

In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 701 N, to the top of the building. Number i Units î

A solid sphere of radius 45 cm and mass 10 kg is allowed to rotate about its center. A1 kg mass hangs by a string off the disk, and it is released from rest. The string unwinds from the disk without slipping. a. Find the linear acceleration of the 1 kg mass while it is connected to the string.

The 500 kg concrete culvert has a mean radius of 0.5m. Part A If the truck has an acceleration of 3 m/s?, determine the culvert's angular acceleration. Assume that the culvert does not slip on the truck bed, and neglect its thickness. (Figure 1) Express your answer with the appropriate units. HÀ ? a = Value Units Submit Request Answer Figure 1 of 1 Provide Feedback Next > 4 m 3 m/s 0.5m