(a) At a certain instant, a particle-like object is acted on by a force F = (2.60 N) – (3.70 N) + (7.60 N) while the object's velocity is = - (2.70 m/s ) + (3.40 m/s) . 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 -5.40 W, what is the velocity of the object just then? (Give your answer without a unit vector.) (a) Number (b) Number Units Units
(a) At a certain instant, a particle-like object is acted on by a force F = (2.60 N) – (3.70 N) + (7.60 N) while the object's velocity is = - (2.70 m/s ) + (3.40 m/s) . 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 -5.40 W, what is the velocity of the object just then? (Give your answer without a unit vector.) (a) Number (b) Number Units Units
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 88AP: Consider a particle on which a force acts that depends on the position of the particle. This force...
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Transcribed Image Text:(a) At a certain instant, a particle-like object is acted on by a force F = (2.60 N) – (3.70 N) + (7.60 N)k while the object's
velocity is u (2.70 m/s) + (3.40 m/s) . 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 -5.40 W, what is
the velocity of the object just then? (Give your answer without a unit vector.)
(a) Number
(b) Number
Fo
Units
Units
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