A horizontal beam of length 4 m and mass 4.0 kg has a mass of 5.0 kg and width 0.8 m sitting at the end of the beam (see the following figure). What is the torque due to gravity (in N m) on the beam-block system about the support at the wall? (Enter the magnitude.) Wall support 0.8 m, 5.0 kg 4 m, 4.0 kg N m t

A horizontal beam of length 4 m and mass 4.0 kg has a mass of 5.0 kg and width 0.8 m sitting at the end of the beam (see the following figure). What is the torque due to gravity (in N m) on the beam-block system about the support at the wall? (Enter the magnitude.) Wall support 0.8 m, 5.0 kg 4 m, 4.0 kg N m t

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

The 3.8 m long board shown in the image has a mass of 6.4 kg. The left support is 0.40 m from left end of the board. The right support is 1.2 m from the right end of the board. The cat has a mass of 5.0 kg and starts walking to the right. How far from the right support can the cat walk before the board tips over? (Give your answer in m.) Hints: There are two possible ways to solve this problem 1) Use the center of mass: Find the cat's position when the entire system's center of mass is at the right support. 2) Use torque: Set the pivot point at the right support and find the torque due to the weight of the beam and the weight of the cat. Answer:
A counterweight of mass m = 4.70 kg is attached to a light cord that is wound around a pulley as shown in the figure below. The pulley is a thin hoop of radius R = 9.00 cm and mass M = 1.50 kg. The spokes have negligible mass. M Ⓡ (a) What is the net torque on the system about the axle of the pulley? magnitude N.m direction ---Select--- (b) When the counterweight has a speed v, the pulley has an angular speed = v/R. Determine the magnitude of the total angular momentum of the system about the axle of the pulley. kg. m)v (c) Using your result from (b) and 7 = dĹ/dt, calculate the acceleration of the counterweight. (Enter the magnitude of the acceleration.) m/s²
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
The engine of an airplane drives a propeller with 2.25 m in length and a mass of 90 kg. If the engine delivers a torque of 100 N⋅m, determine the time it takes the propeller to reach 300 rev/min on start-up.
Two forces are applied to a door. Both forces are applied at the door knob, and both forces have the same magnitude. The first force is applied perpendicular to the door, and the second force is applied at 15 degrees to the plane of the door. Which force exerts the greater torque about the door hinge?
Inigo and Fezzik push with perpendicular forces on a heavy door with width R. Inigo pushes with force F at 3R/4 from the hinge, while Fezzik pushes with force 2F at R/3 from the hinge. Which of the following descriptions is correct? (diagram shows the top-down view) hinge O B ОА A. Inigo (pushing with F) exerts a greater a torque on the door. B. Fezzik (pushing with 2F) exerts a greater a torque on the door. C. The torques they exert are equal in magnitude. D. There is zero net torque on the door. OD 3R/4 O C R/3 2F
A rectangular bar is hinged at point O. The bar is 3.00 m long and 2.00 m wide. Find the torque resulting from the following force about an axis through point O: F1 = 1 N. Use a positive for a counterclockwise torque and a negative for a clockwise torque.
In the figure, what magnitude of force F applied horizontally at the axle of the wheel is necessary to raise the wheel over an obstacle of height h = 0.356 m? The wheel's radius is r = 0.662 m and its mass is m = 1.71 kg. F
When opening a door, you push on it perpendicularly with a force of 52.5 N at a distance of 0.825m from the hinges. a) What torque are you exerting relative to the hinges?
In the figure, what magnitude of force F applied horizontally at the axle of the wheel is necessary to raise the wheel over an obstacle of height h = 0.281 m? The wheel's radius is r = 0.718 m and its mass is m = 1.28 kg. O Number Units h
A tower crane (Figure 1) must always be carefully balanced so that there is no net torque tending to tip it. A particular crane at a building site is about to lift a m = 2700-kg air-conditioning unit. The crane's dimensions are shown in (Figure 2). The crane's counterweight has a mass of M = 10000 kg . Ignore the mass of the beam. Where must the crane's counterweight be placed when the load is lifted from the ground? (The counterweight is usually moved automatically via sensors and motors to precisely compensate for the load.)Express your answer to two significant figures and include the appropriate units. Determine the maximum load that can be lifted with this counterweight when it is placed at its full extent.Express your answer to two significant figures and include the appropriate units.
A seesaw with a length of 5 m and a mass of 40 kg is pivoted at its center. A 15kg child sits on one end. a.) If the parent pushes at a distance of 2m from the center, what force should she exert to keep the seesaw level? b.) What will be the answer in (a) if the weight of the seesaw is doubled?