Posted by Zac on Wednesday, July 25, 2012 at 8:24pm.
A block of mass m = 2.00 kg rests on the left edge of a block of mass M = 8.00 kg. The
coefficient of kinetic friction between the two blocks is 0.300, and the surface on which the 8.00
kg block rests is frictionless. A constant horizontal force of magnitude F = 10.0 N is applied to
the 2.00kg block, setting it in motion across the top of the lower block. If the distance across the
larger block is 3.00 m (from front edge of smaller block to rightmost edge of larger block),
(a) how long will it take the smaller block make it to the right side of the 8.00kg block. (b) How
far will the 8.00kg block move in this time?

Physics  Elena, Thursday, July 26, 2012 at 3:37pm
m1=2 kg, m2=8 kg, μ=0.3, F=10 N.
For m1:
m1•g=N,
m1•a1=FF(fr) = F μ•N=F μ•m1•g.
a1=F/m1  μ•g = 10/2 0.3•9.8 = 2.06 m/s²
For m2:
m2•a2=F(fr)
a2=F(fr)/m2= μ•m1•g/m2 = 0.3•2•9.8/8 = 0.735 m/s².
Distances
x1=a1•t²/2,
x2=a2•t²/2,
x1=x2+L,
a1•t²/2 = a2•t²/2 + L,
Solve for t
t=2.13 s.
x2=a2•t²/2= 1.67 m
Answer This Question
Related Questions
 Physics  A block of mass m1 is on top of a block of mass m2. Block 2 is ...
 Physics  A block with mass M = 5.00 kg rests on a frictionless table and is ...
 mechanics  Q2. A block of massmrests on the left edge of a block of larger ...
 physics  A block of mass M rests on a block of mass M1 = 5.00 kg which is on a ...
 physics  The coefficient of static friction is 0.604 between two blocks. The ...
 Physics  A 5.00kg block is placed on top of a 10.0kg block which rests on a ...
 Physics  A force of 12.7 N pulls horizontally on a 1.4kg block that slides on ...
 physics  A block with mass = 5.0 rests on a frictionless table and is attached ...
 physics  A block with mass = 5.0 rests on a frictionless table and is attached ...
 Physics  A block M1 of mass 13.0 kg sits on top of a larger block M2 of mass 23...
More Related Questions