Explanation Figure 1 represents the free body diagram for the board. The board is in uniform in its center of gravity. In order to be in equilibrium , the sum of forces acting along a direction will be zero. Write the necessary condition for the equilibrium. ∑ F x , F y = 0 ∑ τ = 0 Apply the condition along y condition, F 1 + F 2 − w = 0 (I) Write the expression for torque. τ = F l Here, F is the force, τ is the torque, l is the length. Write the expression for the net torque along x direction. F 2 x − w l = 0 (II) Here, x is the point at which the second person lifts, l is the length, w is the weight. Conclusion: Rearrange the equation I to find F 2 . F 2 = w − F 1 Substitute 160 N for w and 60 N for F 1 in the above equation to find F 2

Masteringphysics With Pearson Etext - Valuepack Access Card - For College Physics

10th Edition

ISBN: 9780321976932

Author: YOUNG

Publisher: PEARSON

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Chapter 10, Problem 37P

To determine

The force and the point at which one of the person lift the wooden board.

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Chapter 10, Problem 36P

Chapter 10, Problem 38P

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Masteringphysics With Pearson Etext - Valuepack Access Card - For College Physics

Ch. 10 - When tightening a bolt, mechanics sometimes extend...Ch. 10 - Prob. 2CQ Ch. 10 - Two identical uniform 30 cm bricks are placed one...Ch. 10 - (a) If the forces on an object balance, do the...Ch. 10 - (a) Can you change the location of your bodys...Ch. 10 - Serious bicyclists say that if you reduce the...Ch. 10 - Prob. 7CQ Ch. 10 - In terms of torques, discuss the action of a claw...Ch. 10 - Why is a tapered water glass with a narrow base...Ch. 10 - True or false? In picking an axis about which to...

Ch. 10 - Global warming. As the earths climate continues to...Ch. 10 - If two spinning objects have the same angular...Ch. 10 - You are designing a wheel that must have a fixed...Ch. 10 - Prob. 2MCP Ch. 10 - A student is sitting on a frictionless rotating...Ch. 10 - If the torques on an object balance, then it...Ch. 10 - If the forces on an object balance, then it...Ch. 10 - Prob. 6MCP Ch. 10 - A person pushes vertically downward with force P...Ch. 10 - String is wrapped around the outer rim of a solid...Ch. 10 - A ball of mass 0.20 kg is whirled in a horizontal...Ch. 10 - A heavy solid disk rotating freely and slowed only...Ch. 10 - A uniform metal meterstick is balanced as shown in...Ch. 10 - Prob. 1P Ch. 10 - Calculate the net torque about point O for the two...Ch. 10 - Three forces are applied to a wheel of radius...Ch. 10 - A 4 N and a 10 N force act on an object. The...Ch. 10 - A square metal plate 0.180 m on each side is...Ch. 10 - A cord is wrapped around the rim of a wheel 0.250...Ch. 10 - A certain type of propeller blade can be modeled...Ch. 10 - A 750 g grinding wheel 25.0 cm in diameter is in...Ch. 10 - A grindstone in the shape of a solid disk with...Ch. 10 - A solid, uniform cylinder with mass 8.00 kg and...Ch. 10 - A 2.00 kg stone is tied to a thin, light wire...Ch. 10 - A light rope is wrapped several times around a...Ch. 10 - A thin, light string is wrapped around the rim of...Ch. 10 - 14. A uniform, 8.40-kg, spherical shell 50.0 cm in...Ch. 10 - A hollow spherical shell with mass 2.00 kg rolls...Ch. 10 - A solid disk of radius 8.50 cm and mass 1.25 kg,...Ch. 10 - What is the power output in horsepower of an...Ch. 10 - A solid uniform sphere of mass 5 kg and radius 0.1...Ch. 10 - A playground merry-go-round has a radius of 4.40 m...Ch. 10 - The flywheel of a motor has a mass of 300.0 kg and...Ch. 10 - Calculate the angular momentum and kinetic energy...Ch. 10 - (a) Calculate the magnitude of the angular...Ch. 10 - A small 0.300 kg bird is flying horizontally at...Ch. 10 - A. small 4.0 kg brick is released from rest 2.5 m...Ch. 10 - The London Eye is the tallest Ferris wheel in...Ch. 10 - A certain drawbridge can be modeled as a uniform...Ch. 10 - On an old-fashioned rotating piano stool, a woman...Ch. 10 - The spinning figure skater. The outstretched hands...Ch. 10 - A small block on a frictionless horizontal surface...Ch. 10 - A uniform 2 kg solid disk of radius R 0.4 m is...Ch. 10 - A diver comes off a board with arms straight up...Ch. 10 - A large turntable rotates about a fixed vertical...Ch. 10 - A large wooden turntable in the shape of a flat...Ch. 10 - Which of the objects shown in Figure 10.55 are in...Ch. 10 - (a) In each of the objects in Figure 10.56, what...Ch. 10 - Prob. 36P Ch. 10 - Prob. 37P Ch. 10 - Prob. 38P Ch. 10 - Prob. 39P Ch. 10 - Prob. 40P Ch. 10 - The horizontal beam in Figure 10.60 weighs 150 N,...Ch. 10 - The boom in Figure 10.61 weighs 2600 N and is...Ch. 10 - A uniform ladder 7.0 m long weighing 450 N rests...Ch. 10 - A 9.0 m uniform beam is hinged to a vertical wall...Ch. 10 - A uniform beam 4.0 m long and weighing 2500 N...Ch. 10 - A diving board 3.00 m long is supported at a point...Ch. 10 - Two people carry a heavy electric motor by placing...Ch. 10 - Pumping iron. A 72.0 kg weightlifter is doing arm...Ch. 10 - The deltoid muscle. The deltoid muscle is the main...Ch. 10 - The rotor (flywheel) of a toy gyroscope has a mass...Ch. 10 - For each of the following rotating objects,...Ch. 10 - Prob. 52GP Ch. 10 - A good workout. You are doing exercises on a...Ch. 10 - Prior to being placed in its hole, a 5700 N,...Ch. 10 - Prob. 55GP Ch. 10 - One end of a 1.2-m-long beam is hinged to a...Ch. 10 - The farmyard gate. A gate 4.00 m wide and 2.00 m...Ch. 10 - 58. Atwoods machine. Figure 10.72 illustrates an...Ch. 10 - Prob. 59GP Ch. 10 - The forces on the foot. A 750 N athlete standing...Ch. 10 - A uniform solid cylinder of mass M is supported on...Ch. 10 - Prob. 62GP Ch. 10 - You are trying to raise a bicycle wheel of mass m...Ch. 10 - An experimental bicycle wheel is placed on a test...Ch. 10 - Prob. 65GP Ch. 10 - Disks A and B are mounted on shaft SS and may be...Ch. 10 - One end of a thin, uniform rod is connected to a...Ch. 10 - A uniform, 7.5-m-long beam weighing 9000 N is...Ch. 10 - Human moment of inertia. The moment of inertia of...Ch. 10 - While the turntable is being accelerated, the...Ch. 10 - A doubling of the torque produces a greater...Ch. 10 - If the bodys center of mass were not placed on the...Ch. 10 - Torques and tug-of-war. In a study of the...Ch. 10 - If the competitor leans slightly farther back...Ch. 10 - Torques and tug-of-war. In a study of the...

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