- #1
songoku
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Homework Statement
A sack of weight 600 N is being loaded on to a truck up a ramp inclined at 18o to the horizontal. A rope attached to the sack is held at an angle of 25o to the ramp. The coefficient of friction between the sack and the ramp is 0.3. What tension in the rope is needed:
a. To prevent the sack from sliding down the ramp.
b. To pull the sack up the ramp at a steady speed
Homework Equations
F = ma
The Attempt at a Solution
The manual wrote the answer for (a) is 18.2 N. I can't find it. My work for (a) :
W sin 18o = T cos 25o
T = 204.6 N
What am I missing ?
Thanks