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(b) Similarly, finding the value of a is straightforward: a = g ( m A sin θ – μ k m B )/( m A + m B ) =1.6 m/s 2 . 81. (a) If we choose “downhill” positive, then Newton’s law gives m A g sin θ – f A – T = m A a for block A (where = 30º). For block B we choose leftward as the positive direction and write T – f B = m B a. Now f A = k ,incline
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
- Spring '08