Chapter 07, Problem 047 Z Your answer is partially correct. Try again. A machine carries a 7.0 kg package from an initial position of d , = (0.7 m) i + (0.79 m)j + (0.25 m)k at t = 0 to a final position of d = (11.5 m)î + (15.0 m)ĵ + (9.2 m)k at t = 13.0 s. The constant force applied by the machine on the package is F = (6.0 N)? + (5.ON)} +(8.0 N)k. For that displacement, find (a) the work done on the package by the machine's force and (b) the average power of the machine's force on the package. (a) Number T119 Units (b) Number TT9.22 UnitsTw Click if you would like to Show Work for this question: Open Show Work SHOW HINT MATH HELP VIDEO MINI-LECTURE LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM

Chapter 07, Problem 047 Z Your answer is partially correct. Try again. A machine carries a 7.0 kg package from an initial position of d , = (0.7 m) i + (0.79 m)j + (0.25 m)k at t = 0 to a final position of d = (11.5 m)î + (15.0 m)ĵ + (9.2 m)k at t = 13.0 s. The constant force applied by the machine on the package is F = (6.0 N)? + (5.ON)} +(8.0 N)k. For that displacement, find (a) the work done on the package by the machine's force and (b) the average power of the machine's force on the package. (a) Number T119 Units (b) Number TT9.22 UnitsTw Click if you would like to Show Work for this question: Open Show Work SHOW HINT MATH HELP VIDEO MINI-LECTURE LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM

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Description: PRINTER VERSION1 BACKNEXTChapter 07, Problem 047Your answer is partially correct. Try again.A machine carries a 7.0 kg package from an initial position of d; = (0.7 m) i+ (0.79 m) j + (0.25 m)k at t = 0 to a final position ofd; = (11.5 m)ì + (15.0 m

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 6PQ

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A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46
A ball of mass m = 1.80 kg is released from rest at a height h = 65.0 cm above a light vertical spring of force constant k as in Figure P5.64a. The ball strikes the top of the spring and compresses it a distance d = 9.00 cm as in Figure P5.64b. Neglecting any energy losses during the collision, find (a) the speed of the hall just as it touches the spring and (b) the force constant of the spring.
A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46
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A ball of mass m = 1.80 kg is released from rest at a height h = 65.0 cm above a light vertical spring of force constant k as in Figure P5.64a. The ball strikes the top of the spring and compresses it a distance d = 9.00 cm as in Figure P5.64b. Neglecting any energy losses during the collision, find (a) the speed of the hall just as it touches the spring and (b) the force constant of the spring.
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