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Physics / Fundamentals of Physics 10 / Chapter 7 / Problem 12

Fundamentals of Physics | 10th Edition | ISBN: 9781118230725 | Authors: David Halliday; Robert Resnick; Jearl Walker

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A can of bolts and nuts is pushed 2.00 m along an x axis

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QUESTION:

A can of bolts and nuts is pushed 2.00 m along an x axis by a broom along the greasy (frictionless) floor of a car repair shop in a version of shuffleboard. Figure 7-26 gives the work W done on the can by the constant horizontal force from the broom, versus the cans position x.The scale of the figures vertical axis is set by Ws ! 6.0 J. (a) What is the magnitude of that force? (b) If the can had an initial kinetic energy of 3.00 J, moving in the positive direction of the x axis, what is its kinetic energy at the end of the 2.00 m?

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QUESTION:

A can of bolts and nuts is pushed 2.00 m along an x axis by a broom along the greasy (frictionless) floor of a car repair shop in a version of shuffleboard. Figure 7-26 gives the work W done on the can by the constant horizontal force from the broom, versus the cans position x.The scale of the figures vertical axis is set by Ws ! 6.0 J. (a) What is the magnitude of that force? (b) If the can had an initial kinetic energy of 3.00 J, moving in the positive direction of the x axis, what is its kinetic energy at the end of the 2.00 m?

ANSWER:

Step 1 of 2 a) The work done on the can is given by, We know that, Implies, Given the displacement of the can is, Implies, The magnitude of the horizontal force on the can is .

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