W6.1 - Physics for Scientists & Engineers 1 Spring...

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February 12, 2008 1 Engineers 1 Engineers 1 Spring Semester 2008 Lecture 19
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February 12, 2008 2 Kinetic Energy: Summary Kinetic Energy: Summary Definition: (note: K can never be negative!) Energy unit: Work - Kinetic Energy Theorem: 1 J = 1 kg m 2 s -2 ! K " K # K 0 = W K = 1 2 mv 2
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February 12, 2008 3 Work: Summary Work: Summary Work for constant force - 1d Work for constant force - 3d Work done by a variable force, 1d case Most general 3d case Work done against gravity Work changing length of spring W = F ( x ') dx x 0 x ! ' W = ! F ! r ' ( )• d ! r ' ! r 0 ! r ! W = ! 1 2 kx 2 + 1 2 kx 0 2 W = ! F ! ! r = ! F ! ! r cos " F ! r W = F ! " x = F ! ( x # x 0 ) W g = mgh
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February 12, 2008 4 Power: Summary Power: Summary Definition of power as the rate at which work is done
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This note was uploaded on 04/06/2008 for the course PHY 183 taught by Professor Wolf during the Spring '08 term at Michigan State University.

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W6.1 - Physics for Scientists & Engineers 1 Spring...

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