7. A block of mass m slides with constant velocity v down a plane inclined at 0 with the horizontal. During the time interval At, what is the magnitude of the energy dissipated by friction? (a) mgv At tan 0 (b) mgv At sin 0 (c) 1/2 mv3 At (d) The answer cannot be determined without knowing the coefficient of kinetic friction.
7. A block of mass m slides with constant velocity v down a plane inclined at 0 with the horizontal. During the time interval At, what is the magnitude of the energy dissipated by friction? (a) mgv At tan 0 (b) mgv At sin 0 (c) 1/2 mv3 At (d) The answer cannot be determined without knowing the coefficient of kinetic friction.
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 80P: Coal is lifted out of a mine a vertical distance of 50 m by an engine that supplies 500 W to a...
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