Posted by Doug on Tuesday, May 25, 2010 at 1:00am.
Sorry here's the picture:
img245.imageshack.us/img245/3526/2505100050.jpg
No; it's not right. First of all, 20 m/s is a speed, not an acceleration.
The two masses accelerate at different rates because there is very little friction and the top mass tends to be left behind. The top mass (#2) is accelerated only by the kinetic friction force between the blocks, which is
0.0005 M2 g = M2*a2, so
a2 = 0.0005 g = .0049 m/s^2
and the force that accelerates M2 is just M2 a2 = 0.0049 N
The force that accelerates M1 is
20N - (3 kg)(0.0001)g - 0.0049 = M1*a1
20N - .0029N - .0049N = 2 a1
a1 = 9.996 m/s^2
Thank you! I see where I went wrong
Related Questions
Physics - A 0.5 kg wooden block is placed on top of a 1.0 kg wooden block. The ...
Physics - A lower block is being pulled to the right across a wooden table and ...
physics - The coefficient of static friction is 0.604 between two blocks. The ...
Mechanics - A 30.0-kg block is resting on a flat horizontal table. On top of ...
physics - Block 1, of mass1 = 0.550kg , is connected over an ideal (massless ...
Physics - A block of mass m1 = 4.80 kg sits on top of a second block of mass m2...
Physics - A block slides down an inclined plane that makes an angle of 23° ...
physics - The coefficient of static friction between a block and a horizontal ...
physics - A 450 g block is at rest on a horizontal surface. The coefficient of ...
Physics - A 40kg block is pushed along a level surface with a 200 N force at an...
For Further Reading
