A wrench is used to tighten a nut. A 100-N force is applied 0.10 m from the axis of rotation. what is the work done to turn the nut through 1.5 radians ?
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A wrench is used to tighten a nut. A 100-N force is applied 0.10 m from the axis of rotation. what is the work done to turn the nut through 1.5 radians ?
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- A 4 kg ball with a 0.5 m radius rolls at a constant 4 rad/s. The rotational inertia of the ball is 0.5 mr2. What is the total energy of the ball? - 8 J - 4 J - 16 J - 12 JDelivery trucks that operate by making use of energy stored in a rotating flywheel have been used in Europe. The trucks are charged by using an electric motor to get the flywheel up to its top speed of 1,000.0rad/s. One such flywheel is a solid disc, rotating about its central axis, with a mass of 1,010.0kg and a radius of 1.2m. What is the kinetic energy (in J) of the flywheel after charging?Two pulleys, one with radius 8 inches and one with radius 4 inches are connected by a belt, so that they have the same linear speed. The 4 inch pulley begins rotating at an angular speed of 2 revolutions per minute. Compute the linear speed of the 8 inch pulley. The 4 inch pulley and 8 inch pulley are connected, and so will have the same linear speed. Compute the angular speed of the 8 inch pulley. Give your answer in each of the following forms: • radians per minute degrees per minute • revolutions per minute
- A centrifuge has a rotational inertia of 5.50 × 10−3 kg m2. How much energy must be supplied to bring it from rest to 500 rad/s? Multiple Choice 627 J 570 J 583 J 743 J 688 JA system of point particles is shown in the figure. Each particle has mass 1.0 kg and they all lie in the same plane. If the system rotates at 10 rev/s, what is its rotational kinetic energy? 40 cm axis 20 cm 60 cm O 1.1 x 103 . O 2.2 x 103 ) 3.4 x 103 J O 4,4 x 103 ) 5.2 x 103 JA small object with mass 3.65 kg moves counterclockwise with constant speed 1.40 rad/s in a circle of radius 2.80 m centered at the origin. It starts at the point with position vector 2.80î m. Then it undergoes an angular displacement of 8.55 rad. (a) What is its new position vector? (b) In what quadrant is the object located and what angle does its position vector make with the positive x-axis? ---Select-- at (c) What is its velocity? m/s (d) In what direction is it moving? 'from the +x direction. (e) What is its acceleration? m/s2 (f) Make a sketch of its position, velocity, and acceleration vectors. ls susl lalslae d This answer has not been graded yet. (g) What total force is exerted on the object?
- A 392 N wheel comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at 25.0 rad/. The radius of the wheel is 0.600 m, and its moment of inertia about its rotation axis is 0.800MR2. Friction does work on the wheel as it rolls up the hill to a stop, a height h above the bottom of the hill; this work has absolute value 2600 J. Calculate h.A large door is a uniform rectangle, with height h and width w and mass m, which is free to rotate about one long side. What is the smallest force required to open the door with constant angular acceleration a? Parameters: h = 2.70 m; w = 1.30 m; m = 50 kg; a = 0.30 rad/s^2. (in N) OA: 0.883 OB: 1.174 OC: 1.562 OD: 2.077 OE: 2.763 OF: 3.675 OG: 4.887 OH: 6.500Mary is an avid game show fan and one of the contestants on a popular game show. She spins the wheel and after 1.5 revolutions, the wheel comes to rest on a space that has a $1,500.00 prize. If the initial angular speed of the wheel is 3.15 rad/s, find the angle through which the wheel has turned when the angular speed is 1.20 rad/s. rev
- A 14.0 Nm torque is applied to a rod (mass = 8.79 and length 1.510 m) that rotates about its end. If the rod starts from rest, how long does it take to make 15.0 rev? Use g=9.8A professor sits on a rotating stool that is spinning at 10.0 rpm while she holds a heavy weight in each of her hands. Her outstretched hands are 0.745 m from the axis of rotation, which passes through her head into the center of the stool. When she symmetrically pulls the weights in closer to her body, her angular speed increases to 40.5 rpm. Neglecting the mass of the professor, how far are the weights from the rotational axis after she pulls her arms in? distance: about us careers privacy policy terms of use contact us help tv W MacBook Air 8828A professor sits on a rotating stool that is spinning at 10.0 rpm while she holds a heavy weight in each of her hands. Her outstretched hands are 0.795 m from the axis of rotation, which passes through her head into the center of the stool. When she symmetrically pulls the weights in closer to her body, her angular speed increases to 20.5 rpm. Neglecting the mass of the professor, how far are the weights from the rotational axis after she pulls her arms in?