Part A What is the angular momentum of a 3.0-kg uniform cylindrical grinding wheel of radius 25 cm when rotating at 1400 rpm? Express your answer using three significant figures and include the appropriate units. L= Submit Part B |T|= Value Submit μA Request Answer How much torque is required to stop it in 5.0 s? Express your answer using three significant figures and include the appropriate units.. Provide Feedback μA Value Units Request Answer ? Units Review | Constants ? Next >
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- A 15.1-cm long pen is tossed up in the air, reaching a maximum height of 1.49 m above its release point. On the way up, the pen makes 2.3 revolutions. Treating the pen as a thin uniform rod, calculate the ratio between the rotational kinetic energy and the translational kinetic energy at the instant the pen is released. Assume that the rotational speed does not change during the toss. 0.101 Submit Answer Incorrect. Tries 1/99 Previous Tries Pnet NieruccionThe spool has a mass of 90 kg and a radius of gyration kc = 0.3 m (Figure 1) Part A If the coefficients of static and kinetic friction at A are us = 0.2 and u = 0.15, respectively, determine the angular acceleration of the spool if P = 620 N. Express your answer to three significant figures and include the appropriate units. HA ? a = Value Units Submit Request Answer Figure Provide Feedback Next > P G. 250 mm 400 mmA hollow spherical shell with mass 2.00 kg rolls without slipping down at 38° slope. a. Find the acceleration, the friction force, and the minimum coefficient needed to prevent slipping. b. How would your answers to part a) change if the mass were doubled to 4.00 kg?
- Previous Problem Problem List Next Problem A horizontal circular platform (M = 97.1 kg, r = 3.25 m) rotates about a frictionless vertical axle. A 63.3-kg student walks slowly from the rim of the platform toward the center. The angular velocity of the system is 2.3 rad/s when the student is at the rim. Find the angular velocity of %3D the system when the student is 1.31 m from the center. HINT: Remember to conserve angular momentum of the system both before and after the student moves. Preview My Answers Submit AnswersA group of 17 students, each of whom can pull with 100lb of force, is trying to topple a 8000lb statue that the school built for the meanest teacher. Assume the statue does not slide. 5ft Answer all questions relative to the rotation point. How much torque is caused by the statue's weight? unit v note: actual number of How much torque is caused by the students? students is described in unit v problem Would the students be able to tip the statue? cannot be determined finalize (after completing ALL problems) check answers torque, complete problems 1 s Scientific Online CalculatorProf. de Silva conducted the experiment in terms of physics principles related to rotational motion. The experiment involved Prof. de Silva using a sword to break a long wooden stick that is balanced on two wine glasses. 1. Describe Rotational Force. 2. Provide a diagram showing all the forces acting in the above scenario and their direction of those forces. 3. Your opinion on the performance and apply physics principles to explain the outcome and any limitations.
- Cons A constant torgue of 25 m - N is applied to the rim of a 15-kg uniform disk of radius 0.30 m. Part A What is the angular speed of the disk about an axis through its center after it rotates 2.0 revolutions from rest? Express your answer using two significant figures. Ην ΑΣφ rad/s Previous Answers Request Answer Submit X Incorrect; Try Again; 5 attempts remainingSolve it correctly please. I will rate accordinglyUsing the equations attached solve the following: 1.What is the average angular velocity between t = 2.0 s and t=3.1 s ? Express your answer using two significant figures. 2.What is the average angular acceleration between t = 2.0 s and t =3.1 s ? Express your answer using two significant figures.
- The fishing pole in the figure below makes an angle of 20.0° with the horizontal. What is the magnitude of the torque exerted by the fish about an axis perpendicular to the page and passing through the angler's hand if the fish pulls on the fishing line with a force F = 115 N at an angle 37.0° below the horizontal? The force is applied at a point L = 2.20 m from the angler's hands. N.m 20.0° 20.0⁰ 37.0° FAn engineer trying to determine whether or not her crane can lift loads (at the position shown), Her crane has a 5K chassis and 40K counterweight. Assume all other parts of the crane have negligible weight. 5ft Answer all questions relative to the rotation point. How much torque is caused by the chassis? unit v How much torque is caused by the counterweight? unit v How heavy of a load would "barely balance" the crane? unit BARNHART weight Could the crane lift the following loads without tipping over? 15K yes or nov 20K yes or nov 25K yes or novv 30K ves or nov cannot be determi check answers finalize (after completing ALL problems) CopThree forces are applied to a wheel of radius 0.350 m, as shown in the figure (Figure 1). One force is perpendicular to the rim, one is tangent to it, and the other one makes a 40.0° angle with the radius. Figure 11.9 N 0.350 m 40.00 14.6 N 8.50 N 1 of 1 Provide F