Forces are applied on the beam as shown on the figure at right: a. Find the torque about point P produced by each of the three forces. b. Find the net torque about point P. c. A fourth force is applied to the beam at a distance of 0.30 m to the right of 0.15m point P. What must the magnitude 15 N 0.25m P 0.2m and direction of this force be to make 20 N 5 N the beam in rotational equilibrium?

Forces are applied on the beam as shown on the figure at right: a. Find the torque about point P produced by each of the three forces. b. Find the net torque about point P. c. A fourth force is applied to the beam at a distance of 0.30 m to the right of 0.15m point P. What must the magnitude 15 N 0.25m P 0.2m and direction of this force be to make 20 N 5 N the beam in rotational equilibrium?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section8.2: Rotational Dynamics

Problem 33SSC

See similar textbooks

Similar questions

What are the necessary conditions for equilibrium of the object shown in Figure P12.1? Calculate torques about an axis through point O.
Two forces F1 and F2 act along the two sides of an equilateral triangle as shown in Figure P11.5. Point O is the intersection of the altitudes of the triangle. (a) Find the magnitude of a third force F3 to be applied at B and along BC that will make the total torque zero about the point O. (b) What If? Will the total torque change if F3 is applied not at B but at any other point along BC? Figure P11.5
Under what conditions can a rotating body be in equilibrium? Give an example.
Tom and Jerry both push on the 3.00-m-diameter merry-go-round shown in (Figure 1). Tom pushes with a force of 50.0 N and Jerry pushes with a force of 33.0 N . What is the net torque on the merry-go-round? Express your answer to three significant figures and include the appropriate units. What is the net torque if Jerry reverses the direction that he pushes by 180∘ without changing the magnitude of his force? Express your answer to three significant figures and include the appropriate units.
(Figure 1) shows a uniform 2.0 kg rod that can pivot in a vertical plane on an axle. We want to find the net torque about the axle. For each of the four forces F 1→1, F 2→2, Fgrav→ and F axle→, is the torque about the axle positive (+), negative (-), or zero (0)?
A businessman enters the same revolving door on the right, pushing with 547 N of force directed perpendicular to the door and 0.511 m from the hub, while a boy exerts 370 N perpendicular to the door, 1.57 m to the left of the hub. (Indicate the direction with the sign of your answer.) (a) Find the torques exerted by each person.?boy = N · m?man = N · m(b) Find the net torque on the door.?net = N · m
A strut of lengthL = 3.00 m and mass m =16.0 kg is held by a cableat an angle of θ = 30.0°with respect to the horizontalas shown in FigureP8.30. (a) Sketch a forcediagram, indicating allthe forces and their placementon the strut. (b) Why is the hinge a good place to usefor calculating torques? (c) Write the condition for rotationalequilibrium symbolically, calculating the torques around thehinge. (d) Use the torque equation to calculate the tension in the cable. (e) Write the x- and y-components of Newton’ssecond law for equilibrium. (f) Use the force equation tofind the x- and y -components of the force on the hinge.(g) Assuming the strut position is to remain the same, wouldit be advantageous to attach the cable higher up on the wall?Explain the benefit in terms of the force on the hinge andcable tension.
Two muscles create tension simultaneously on opposite sides of a joint. Muscle X, attaching 4 cm from the axis of rotation at the joint, exerts 336 N of force. Muscle Y, attaching 3.8 cm from the joint axis, exerts 293 N of force. How much torque is created at the joint by each muscle? What is the net torque created at the joint? In which direction will motion at the joint occur?
Three forces are applied to a wheel of radius 0.350 mm, as shown in the figure below. One force is perpendicular to the rim, one is tangent to it, and the other one makes a 40.0 degrees angle with the radius. Let F1=12.4N, F2=14.2N, and F3=8.50N. 1) What is the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center? Let counterclockwise torques be positive. Express your answer in newton-meters.
A force is applied to a stewpan's handle as shown in the figure below. What is the torque applied to the axis passing through the base of the handle perpendicular to the figure? Assume a = 3.0 cm , b = 12 cm , θ = 150 ∘ , F = 16 N .
Three 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. Let F1=11.5N, F2=14.6N, and F3=8.55N What is the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center? Let counterclockwise torques be positive. Express your answer in newton-meters.
Three 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. Let F1=12.3N, F2=14.4N, and F3=8.70N. What is the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center? Let counterclockwise torques be positive.