Two blocks, one 0.8 kg and the other 2.0 kg are connected by a massless string over a frictionless pulley. The coefficient of kinetic friction is 0.14, and the downward ramp angle is 60 degrees.
a) Determine the acceleration of the blocks.
b) Calculate the tension of the string.
2007-03-26 11:13:42 · 1 answers · asked by NeedHelp 1 in Science & Mathematics ➔ Physics
for the diagram its #6 on http://www.physics247.com/physics-homework-help/pulley.php
2007-03-26 11:14:16 · update #1
The first one to solve this will be chosen as best answer:D::Dd
2007-03-26 11:31:02 · update #2
a) Net force will be the component of the larger one's weight (m2*g) that points down the ramp, minus the friction. The friction is the component of the larger one's weight that is normal to the ramp, times mu.
Fnet = 2 kg*g*sin60 - 0.14*2 kg*g*cos60
That force accelerates both masses
Fnet = (m1+m2)*a
b) It is the tension in the string that causes the smaller mass to accelerate.
T = m1*a
2007-03-26 11:52:04 · answer #1 · answered by sojsail 7 · 0⤊ 0⤋