Chapter 11 Rotational Equilibrium 2. To remove a nut from an old rusty bolt, you apply a 100-N force to the end of a wrench perpendicular to the wrench handle. The distance from the applied force to the axis of the bolt is 25 cm. What is the torque exerted on the bolt in N-m?

3. A rowing machine consists of a solid disk with a radius of 20-cm and a mass of 19-kg. An athlete pulls on the attached cable with a force of 10-Newtons and causes the disk to accelerate. If the disk starts from rest, determine; a. The disk's moment of inertia. b. The magnitude of the torque applied by the athlete. C. The disk's angular acceleration. d. The disk's angular momentum at t = 5.0 sec.

The body in the figure below is pivoted at point (), and two forces act on it as shown. → If ri = 1.3 m, r2 = 2.15 m, F₁ 4.2 N, F₂ = 4.9 N, 01 = 75° and 0260°, what is the net torque (in N·m) about the pivot? 14.3 X

1a. The above seesaw has a length of 4.00 m.  It is in equilibrium with the people in places as shown.  The clockwise torque is: A. 200 N m B. 600 N m C. 1000 N m D. 1200 N m    1b. The above seesaw has a length of 4.00 m.  It is in equilibrium with the people in places as shown.  The value of x is A. 0.50 m B. 1.00 m C. 1.50 m D. 2.00 m

A tendon which connects to the lower leg bone 10 cm below the knee joint has to have a tension force of M in order to balance the torque due to the weight of the lower leg. If the torque due to the weight of the lower leg about the knee joint is 5.3 Nm, what is the magnitude of the force M in Newtons? M Knee joint 25.0 0.100 m 0.150 m 30.0

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Choose the correct letter. In pure rotation of a rigid body: A. The equation of motion, = I , where is the torque about the axis B. The kinetic Energy = 12I w2, where I is the angular momentum about the axis C. The angular momentum, L = I w, where L is the moment of inertia about the axis D. Only A and B are correct E. Only B and C are correct F. Only A and C are correct

The figure below is for a 40 kgm? object. o(rad/s) 40.0 20.0 -20.0 -40.0 -60.0 2.0 4.0 t(s) Find the net torque. Find the angular displacement at t = 2.35 s.

3. Three forces are applied to a wheel of radius 0.350 m, as shown in the figure. One force is perpendicular to the rim, one is tangent to it and the other one makes a 40° angle with the radius. What is the net torque on the wheel due to three forces for an axis perpendicular to the wheel and pass through its center? Tnet = -0.31 N.m 11.9 N 0.350 m 40.0° 14.6 N 8.50 N

A 95 N force exerted at the end of a 0.50 m long torque wrench gives rise to a torque of 15 N. m. What is the angle (assumed to be less than 90°) between the wrench handle and the direction of the applied force? A) 20° B) 25° 18° 22°