Explanation Write the expression for the work done. W = F d × cos θ (I) Here, F is the force, d is the displacement, and θ is the angle between force and displacement. Conclusion: Substitute, 90 ° for θ in equation (I), since force and displacement are perpendicular to each other

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ISBN: 9780321601834

Author: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

Publisher: Addison-Wesley

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Question

Chapter 5, Problem 2CQ

To determine

The work done by the vertical force on the backpack.

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Chapter 5, Problem 1CQ

Chapter 5, Problem 3CQ

Chapter 5 Solutions

College Physics

Ch. 5 - Prob. 1MCQ Ch. 5 - Prob. 2MCQ Ch. 5 - Prob. 3MCQ Ch. 5 - Work done in free fall (a) is only positive, (b)...Ch. 5 - Which one of the following has units of work: (a)...Ch. 5 - Prob. 6MCQ Ch. 5 - Which of the following is a scalar quantity: (a)...Ch. 5 - Prob. 8MCQ Ch. 5 - Prob. 9MCQ Ch. 5 - Prob. 10MCQ

Ch. 5 - A change in gravitational potential energy (a) is...Ch. 5 - The change in gravitational potential energy can...Ch. 5 - Prob. 13MCQ Ch. 5 - Prob. 14MCQ Ch. 5 - Prob. 15MCQ Ch. 5 - Prob. 16MCQ Ch. 5 - Prob. 17MCQ Ch. 5 - If the two springs in Exercise 17 are compressed...Ch. 5 - Prob. 19MCQ Ch. 5 - Prob. 20MCQ Ch. 5 - Which of the following is not a unit of power: (a)...Ch. 5 - Consider a 2.0-hp motor and a 1.0-hp motor....Ch. 5 - Prob. 1CQ Ch. 5 - Prob. 2CQ Ch. 5 - Prob. 3CQ Ch. 5 - Prob. 4CQ Ch. 5 - Prob. 5CQ Ch. 5 - Prob. 6CQ Ch. 5 - Prob. 7CQ Ch. 5 - Prob. 8CQ Ch. 5 - Prob. 9CQ Ch. 5 - Prob. 10CQ Ch. 5 - Prob. 11CQ Ch. 5 - Prob. 12CQ Ch. 5 - Prob. 13CQ Ch. 5 - Prob. 14CQ Ch. 5 - For a classroom demonstration, a bowling ball...Ch. 5 - Prob. 16CQ Ch. 5 - Prob. 17CQ Ch. 5 - If the two springs in Exercise 17 are compressed...Ch. 5 - (a) Does efficiency describe how fast work is...Ch. 5 - Two students who weigh the same start at the same...Ch. 5 - Prob. 1E Ch. 5 - Prob. 2E Ch. 5 - Prob. 3E Ch. 5 - Prob. 4E Ch. 5 - Prob. 5E Ch. 5 - A father pulls his young daughter on a sled with a...Ch. 5 - A father pushes horizontally on his daughter’s...Ch. 5 - Prob. 8E Ch. 5 - Prob. 9E Ch. 5 - A crate is dragged 3.0 m along a rough floor with...Ch. 5 - A hot-air balloon ascends at a constant rate. (a)...Ch. 5 - Prob. 12E Ch. 5 - An eraser with a mass of 100 g sits on a book at...Ch. 5 - Prob. 14E Ch. 5 - Prob. 15E Ch. 5 - Prob. 17E Ch. 5 - Prob. 18E Ch. 5 - Prob. 19E Ch. 5 - Prob. 20E Ch. 5 - A certain amount of work is required to stretch a...Ch. 5 - Compute the work done by the variable force in the...Ch. 5 - Prob. 23E Ch. 5 - In gravity-free interstellar space, a spaceship...Ch. 5 - A particular spring has a force constant of 2.5 ×...Ch. 5 - Prob. 26E Ch. 5 - In stretching a spring in an experiment, a student...Ch. 5 - Prob. 28E Ch. 5 - Prob. 29E Ch. 5 - A 1200-kg automobile travels at 90 km/h. (a) What...Ch. 5 - Prob. 31E Ch. 5 - Prob. 32E Ch. 5 - Prob. 33E Ch. 5 - Prob. 34E Ch. 5 - Prob. 35E Ch. 5 - Prob. 36E Ch. 5 - Compute the work done by the variable force in the...Ch. 5 - Prob. 38E Ch. 5 - Prob. 39E Ch. 5 - The floor of the basement of a house is 3.0 m...Ch. 5 - A 0.50-kg mass is placed on the end of a vertical...Ch. 5 - Prob. 42E Ch. 5 - A student has six textbooks, each with a thickness...Ch. 5 - A 1.50-kg mass is placed on the end of a spring...Ch. 5 - Suppose the simple pendulum in Exercise 54 were...Ch. 5 - Prob. 46E Ch. 5 - Prob. 47E Ch. 5 - Prob. 48E Ch. 5 - A 1.00-kg block (M) is on a flat frictionless...Ch. 5 - Prob. 50E Ch. 5 - A 0.20-kg rubber ball is dropped from a height of...Ch. 5 - Prob. 52E Ch. 5 - Prob. 53E Ch. 5 - Prob. 54E Ch. 5 - Suppose the simple pendulum in Exercise 54 were...Ch. 5 - A 1.5-kg box that is sliding on a frictionless...Ch. 5 - A 0.50-kg mass is suspended on a spring that...Ch. 5 - A vertical spring with a force constant of 300 N/m...Ch. 5 - A block with a mass m1 = 6.0 kg sitting on a...Ch. 5 - A hiker plans to swing on a rope across a ravine...Ch. 5 - Prob. 61E Ch. 5 - Prob. 62E Ch. 5 - Prob. 63E Ch. 5 - Prob. 64E Ch. 5 - Prob. 65E Ch. 5 - A pump lifts 200 kg of water per hour a height of...Ch. 5 - Prob. 67E Ch. 5 - Prob. 68E Ch. 5 - Prob. 69E Ch. 5 - How much power must you exert to horizontally drag...Ch. 5 - Prob. 71E Ch. 5 - Prob. 72E Ch. 5 - Prob. 73E Ch. 5 - Prob. 74E Ch. 5 - A 200-g ball is launched from a height of 20.0 m...Ch. 5 - Prob. 76E Ch. 5 - Prob. 77E Ch. 5 - Prob. 78E Ch. 5 - IE A 0.455-kg soccer ball is kicked off level...

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