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Fri Nov 13 13:38:52 2009 [ refresh local cache ]
The Daks Takeaway: Seeking a quarterback to call plays on 401(k)s - NJBIZ
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The Daks Takeaway: Seeking a quarterback to call plays on 401( k )s

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Companies have been dumping their defined benefit pension plans for some time in favor of employee-guided 401( k ) plans. ...
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K. -Lite Mega Codec Pack 5.3.0 | File-Size: 22.5 MB Changes . K. -Lite Mega Codec Pack 5.4.0 | 2009-11-04: * Updated Media Player Classic Home Cinema.

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Mon Nov 9 04:09:51 2009
What is the coefficient of kinetic friction, uek between the block and the table?
Q. A block with mass m = 0.40 kg is forced against a horizontal spring of negligible mass, compressing the spring a distance of 0.20 m. When released, the block moves on a horizontal table top for 1.00 m before coming to rest. The spring constant k is 120 N/m. What is the coefficient of kinetic friction, uek between the block and the table?
Asked by Ashia C - Fri Mar 20 16:03:09 2009 - - 2 Answers - 0 Comments

A. Well remember that (Force of Kinetic Friction) = (friction constant)*(Normalforce) Normal in this case is just (m*g) as it must cancel out the weight the block applies to the table So Forcefriction = (mg)*friction constant Using consveration of energy we know that, U_spring - Work_friction = 0 (energy from beginning when at rest, to end when at rest again) Work_friction = Force of friction * distance_travelled = (mg)*force_constant*d_tra velled U_spring = (1/2)kx^2 (x being the distance compressed) with this you can easily solve for force_constant
Answered by mccragre - Fri Mar 20 16:15:32 2009

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Thu Nov 12 06:57:33 2009