- #1
Saints-94
- 63
- 1
Homework Statement
http://tinypic.com/r/qs9q4o/9 http://tinypic.com/r/qs9q4o/9
Verify that the log will move up the ramp under the given conditions
Homework Equations
The Attempt at a Solution
m1 = 220
m2 = 130
mu = 0.4
theta = 25
g = 9.81
N = (m1*g)*cos(theta)1) m2g – T = m2a Forces acting on Block B
2) 2T – m1g*sin(theta) – mu*N = m1a Forces acting on log1) T = m2g – m2a
2) 2 (m2g – m2a) – (m1g*sin(theta)) – mu*N = m1a2m2g – 2m2a – (m1g*sin25) – (0.4 * N ) = m1a
(220*130*9.81) – (220*9.81*sin25) – (0.4*1956) = m1a + 2m2a
(2550.6) – (912.1) – (782.4) = a(m1+2m2)
856.1 / (m1+2m2) = a
856.1 / (220+260) = aa = 1.78m/s^2
Unsure about the forces acting on the double pulley. I am right to assume it is 2T? Does this give me the correct value of 'a' to assume the log is accelerating up the slope? [/B]