Pearson eText -- Physics for Scientists and Engineers with Modern Physics -- Instant Access (Pearson+)

5th Edition

ISBN: 9780137488179

Author: Douglas Giancoli

Publisher: PEARSON+

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Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.

Equilibrium of Forces

The tension created on one body during push or pull is known as force.

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Textbook Question

Chapter 12, Problem 63GP

When a wood shelf of mass 6.6 kg is fastened inside a slot in a vertical support as shown in Fig. 12–76, the support exerts a torque on the shell. (a) Draw a free-body diagram for the shelf, assuming three vertical forces (two exerted by the support slot—explain why). Then calculate (b) the magnitudes of the three forces and (c) the torque exerted by the support (about the left end of the shelf).

Chapter 12, Problem 63GP, When a wood shelf of mass 6.6 kg is fastened inside a slot in a vertical support as shown in Fig.

FIGURE 12–76

Problem 61.

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Chapter 12, Problem 62GP

Chapter 12, Problem 64GP

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Chapter 12 Solutions

Pearson eText -- Physics for Scientists and Engineers with Modern Physics -- Instant Access (Pearson+)

Ch. 12.1 - Prob. 1AE Ch. 12.2 - We did not need to use the force equation to solve...Ch. 12.2 - CHAPTER-OPENING QUESTIONGuess Now! The diving...Ch. 12.2 - Why is it reasonable to ignore friction along the...Ch. 12.3 - Prob. 1EE Ch. 12.5 - Two steel wires have the same length and are under...Ch. 12 - Describe several situations in which an object is...Ch. 12 - A bungee jumper momentarily comes to rest at the...Ch. 12 - Prob. 3Q Ch. 12 - Your doctors scale has arms on which weights slide...

Ch. 12 - A ground retaining wall is shown in Fig. 1240a....Ch. 12 - Can the sum of the torques on an object be zero...Ch. 12 - A ladder, leaning against a wall, makes a 60 angle...Ch. 12 - Prob. 8Q Ch. 12 - Prob. 9Q Ch. 12 - Place yourself facing the edge of an open door....Ch. 12 - Prob. 11Q Ch. 12 - Prob. 12Q Ch. 12 - Prob. 13Q Ch. 12 - Which of the configurations of brick, (a) or (b)...Ch. 12 - Is the Youngs modulus for a bungee cord smaller or...Ch. 12 - Examine how a pair of scissors or shears cuts...Ch. 12 - Materials such as ordinary concrete and stone are...Ch. 12 - Prob. 1MCQ Ch. 12 - Prob. 2MCQ Ch. 12 - Prob. 3MCQ Ch. 12 - Prob. 4MCQ Ch. 12 - Prob. 5MCQ Ch. 12 - Prob. 6MCQ Ch. 12 - Prob. 7MCQ Ch. 12 - Prob. 8MCQ Ch. 12 - Prob. 9MCQ Ch. 12 - Prob. 10MCQ Ch. 12 - Prob. 11MCQ Ch. 12 - (I) A tower crane (Fig. 1248a) must always be...Ch. 12 - Prob. 2P Ch. 12 - Prob. 3P Ch. 12 - Prob. 4P Ch. 12 - (II) Calculate the forces FA and FB that the...Ch. 12 - Prob. 6P Ch. 12 - Prob. 7P Ch. 12 - Prob. 8P Ch. 12 - Prob. 9P Ch. 12 - (II) Find the tension in the two wires supporting...Ch. 12 - Prob. 12P Ch. 12 - (II) The force required to pull the cork out of...Ch. 12 - Prob. 14P Ch. 12 - (II) Three children are trying to balance on a...Ch. 12 - Prob. 16P Ch. 12 - (II) A traffic light hangs from a pole as shown in...Ch. 12 - Prob. 18P Ch. 12 - Prob. 19P Ch. 12 - Prob. 20P Ch. 12 - Prob. 21P Ch. 12 - Prob. 22P Ch. 12 - Prob. 23P Ch. 12 - (III) A door 2.30 m high and 1.30 m wide has a...Ch. 12 - Prob. 25P Ch. 12 - Prob. 26P Ch. 12 - Prob. 27P Ch. 12 - (III) A uniform ladder of mass m and length leans...Ch. 12 - (III) A refrigerator is approximately a uniform...Ch. 12 - (III) A 56.0-kg person stands 2.0 m from the...Ch. 12 - Prob. 31P Ch. 12 - Prob. 33P Ch. 12 - Prob. 34P Ch. 12 - Prob. 35P Ch. 12 - Prob. 36P Ch. 12 - Prob. 37P Ch. 12 - Prob. 38P Ch. 12 - Prob. 39P Ch. 12 - Prob. 40P Ch. 12 - (I) A sign (mass 1700 kg) hangs from the end of a...Ch. 12 - Prob. 42P Ch. 12 - (II) How much pressure is needed to compress the...Ch. 12 - (II) At depths of 2000 m in the sea, the pressure...Ch. 12 - Prob. 45P Ch. 12 - (I) The femur bone in the human leg has a minimum...Ch. 12 - Prob. 47P Ch. 12 - (II) (a) What is the maximum tension possible in a...Ch. 12 - (II) If a compressive force of 3.3 104 N is...Ch. 12 - Prob. 50P Ch. 12 - (II) Assume the supports of the uniform cantilever...Ch. 12 - Prob. 52P Ch. 12 - Prob. 53P Ch. 12 - Prob. 54P Ch. 12 - Prob. 55P Ch. 12 - (III) The truss shown in Fig. 1272 supports a...Ch. 12 - (II) How high must a pointed arch be if it is to...Ch. 12 - Prob. 60GP Ch. 12 - A cube of side l rests on a rough floor. It is...Ch. 12 - Prob. 62GP Ch. 12 - When a wood shelf of mass 6.6 kg is fastened...Ch. 12 - Prob. 64GP Ch. 12 - Prob. 67GP Ch. 12 - The mobile in Fig. 1274 is in equilibrium. Object...Ch. 12 - A 65.0-kg painter is on a uniform 25-kg scaffold...Ch. 12 - Prob. 70GP Ch. 12 - Prob. 73GP Ch. 12 - Prob. 74GP Ch. 12 - Prob. 76GP Ch. 12 - Prob. 77GP Ch. 12 - Prob. 78GP Ch. 12 - Prob. 79GP Ch. 12 - Parachutists whose chutes have failed to open have...Ch. 12 - Prob. 81GP Ch. 12 - One rod of the square frame shown in Fig. 1295...Ch. 12 - A uniform beam of mass M and length l is mounted...Ch. 12 - Prob. 84GP Ch. 12 - A uniform 6.0-m-long ladder of mass 16.0 kg leans...Ch. 12 - In Fig. 1279, consider the right-hand...Ch. 12 - Assume that a single-span suspension bridge such...Ch. 12 - A uniform sphere of weight mg and radius r0 is...Ch. 12 - A uniform ladder of mass m and length leans at an...Ch. 12 - Prob. 90GP Ch. 12 - Prob. 91GP Ch. 12 - A 23-kg sphere rests between two smooth planes as...Ch. 12 - Prob. 93GP Ch. 12 - Prob. 94GP Ch. 12 - Prob. 95GP

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