(a) At a certain instant, a particle-like object is acted on by a force F = (5.80 N ) - (3.60 N ) ĵĴ + (5.70 N ) ✩ while the object's velocity is = (2.70 m/s ) + (5.10 m/s) k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity consists of only a y component. If the force is unchanged, and the instantaneous power is -5.70 W, what is the velocity of the object just then? (Give your answer without a unit vector.) (a) Number i Units (b) Number i Units
(a) At a certain instant, a particle-like object is acted on by a force F = (5.80 N ) - (3.60 N ) ĵĴ + (5.70 N ) ✩ while the object's velocity is = (2.70 m/s ) + (5.10 m/s) k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity consists of only a y component. If the force is unchanged, and the instantaneous power is -5.70 W, what is the velocity of the object just then? (Give your answer without a unit vector.) (a) Number i Units (b) Number i Units
Physics for Scientists and Engineers, Technology Update (No access codes included)
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Author:Raymond A. Serway, John W. Jewett
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Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.8OQ: An a simple pendulum swings back and forth, the forces acting on the suspended object are (a) the...
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(a) At a certain instant, a particle-like object is acted on by a force F = (5.80 N ) î − (3.60 N ) Ĵ + (5.70 N ) k while the object's
velocity is v
− (2.70 m/s ) î + (5.10 m/s) k. What is the instantaneous rate at which the force does work on the object? (b) At
some other time, the velocity consists of only a y component. If the force is unchanged, and the instantaneous power is -5.70 W, what is
the velocity of the object just then? (Give your answer without a unit vector.)
(a) Number
(b) Number
Units
Units
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