ch05-p063 - 63. The free-body diagrams for m1 and m2 are...

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() 2 3 12 1 22 1 0 2 2(2.80 kg)(9.80 m/s ) 0.200 kg/s 0.653 m/s . ( ) (2.80 kg 1.30 kg) dm m g dm da da dt dm dt m m dt == = = ++ (b) At 3.00 s, t = 11 0 1 ( / ) 1.30 kg ( 0.200 kg/s)(3.00 s) 0.700 kg, m m dm dt t =+ = + = and the rate of change of acceleration is 2 3 1 1 2 2(2.80 kg)(9.80 m/s ) 0.200 kg/s 0.896 m/s . ( ) (2.80 kg 0.700 kg) dm m g dm da da dt dm dt m m dt = = (c) The acceleration reaches its maximum value when 0 1 0 ( / ) 1.30 kg ( 0.200 kg/s) , m m dm dt t t + = + or 6.50 s. t = 63. The free-body diagrams for 1 m and 2 m are shown in the figures below. The only forces on the blocks are the upward
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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.

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