You have a grindstone (a disk) that is 198.641 kg, has a 0.699-m radius, and is turning at 97.425 rpm, and you press a steel axe against it with a radial force of 89.000 N. Assuming the stone makes 6 turns before coming to rest. What is the the kinetic coefficient of friction between steel and stone? The moment of inertia of the grand stone is 1/2*mass*(radius)2

Problem 1 Seeing Double Two blocks are connected to one another with ropes as shown on a frictionless table. The m block is a distance r from the center while the 2m block is a distance r from the center. They have an angular speed of w. (a) What is the linear speed of each block? (b) Find the tension in each rope. (c) If the masses complete a circle 8 times every second, what is w in rad/s? G

T3.18 Please help me answer this physics question.

uestión A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.867 rad/s. You, with a mass of 74.3 kg, walk clockwise around the platform along its edge at the speed of 1.07 m/s with respect to the platform. Your 20.1 kg poodle also walks clockwise around the platform, but along a circle at half the platform's radius and at half your linear speed with respect to the platform. Your 18.5 kg mutt, on the other hand, sits still on the platform at a position that is 3/4 of the platform's radius from the center. Model the platform as a uniform disk with mass 93.1 kg and radius 1.85 m. Calculate the total angular momentum of the system. total angular momentum: kg - m²/s

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A dentist using a dental drill brings it from rest to maximum operating speed of 352,000 rpm in 4.0 s. Assume that the drill accelerates at a constant rate during this time. (a) What is the angular acceleration of the drill in rev/s2? rev/s² (b) Find the number of revolutions the drill bit makes during the 4.0 s time interval. rev

Problem 1: Consider a small block weighing 200 grams that is placed 10 cm from the center of turntable. The turntable slowly begins to spin. If the static friction coefficient is g = 0.4, at what angular velocity will the block begin sliding off the turntable?

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Two boxes are connected to a string, and the string is hung over a pulley connected to the ceiling, as shown in the figure below. m1 MOR mq = The masses of the boxes are m₁ = 16.0 kg and m₂ = 11.5 kg, the mass of the pulley is M 5.00 kg, and the radius of the pulley is R = 0.300 m. Box m2 is initially on the floor, and box m₁ is initially 5.00 m above the floor when it is released from rest. The pulley's axis has negligible friction. The mass of the string is small enough to be ignored, and the string does not slip on the pulley, nor does it stretch. (a) How much time (in s) does it take box m₁ to hit the floor after being released? At ₁ = = S (b) How would your answer to part (a) change if the mass of the pulley were neglected? (Enter the time, in seconds, it takes box m₁ to hit the floor if the mass of the pulley were neglected.) At₂ = S

A car accelerates uniformly from rest and reaches a speed of 22.4 m/s in 8.92 s. Assume the diameter of a tire is 57.8 cm. (a) Find the number of revolutions the tire makes during this motion, assuming that no slipping occurs. rev (b) What is the final angular speed of a tire in revolutions per second? rev/s