Friction Question: Finding Time and Distance with Kinetic Coefficients

  • Thread starter Thread starter car202
  • Start date Start date
  • Tags Tags
    Friction
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
2 replies · 3K views
car202
Messages
12
Reaction score
0

Homework Statement



A block of mass m = 2.20 kg rests on the left edge of a block of larger mass M = 6.90 kg. The coefficient of kinetic friction between the two blocks is 0.310, and the surface on which the 6.90 kg block rests is frictionless. A constant horizontal force of magnitude F = 19.20 N is applied to the 2.20 kg block, setting it in motion as shown in the figure, part (a) . If the distance L that the leading edge of the smaller block travels on the larger block is 3.60 m, how long will it take before this block reaches the right side of the 6.90 kg block, as shown in the figure, part (b)? Use g=9.81 m/s2 as usual.

<img src ="http://capa.mcgill.ca/res/mcgill/dcmcgill/oldproblems/mcgilllib/Kilfoil/graphics/p5_65.jpg">

How far does the 6.90 kg block move in the process?




Homework Equations



Ffriction = (mu)Fn
F = ma



The Attempt at a Solution




I got 1.13s, but it says it's wrong

second one..well i need first solution to solve..

I got .548 m with 1.13s...
 
Physics news on Phys.org
Oops, I got the answer..kk FYI answers were 1.24 s and .740 m.
 
Can you show step by step of how you did the question?:smile: