ELEVATOR WEIGHT and NEWTONS SECOND LAW httpswwwyoutubecomwatchvsVVKpRvuNG0 No Acceleration Go up Speeding up a Go up Slowdown a F NET ma F N mg 0 F N mg F N mg ma ID: 772463
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ELEVATOR –WEIGHT and NEWTON’S SECOND LAW https://www.youtube.com/watch?v=sVVKpRvuNG0
No Acceleration Go up+ Speeding up ( +a) Go up+ Slowdown (-a) F NET = ma F N - mg = 0 FN = mg FN – mg = maFN = mg +maFN= m (g + a) F N – mg = - ma F N = mg -ma F N = m (g- a)
Go down+ Slowdown ( +a ) Go Down +Speed up (-a) Free Fall ( a = -g) F N – mg = ma F N = mg +maFN= m (g+a) FN – mg = - maFN = mg -maFN= m (g-a)FN – mg = -mgFN = mg -mgFN= m (g- g) = 0
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Copyright © 2005 Pearson Prentice Hall, Inc. Find the acceleration and the tension in the rope. μ = 0.20