Posted by Millie on Friday, November 18, 2011 at 4:24pm.
A 26.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.490 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move.
Part A of the question asked me to calculate the mass of sand added to the bucket which i determined to be 11.7 kg.
Part B asks the acceleration of the system downward. Can someone help?
- Physics - Henry, Sunday, November 20, 2011 at 9:42pm
Wb = mg = 26kg * 9.8N/kg = 254.8N.
Fb = 254.8N @ 0deg.,
Fp = 254.8sin(0) = 0 = Force parallel to table.
Fv = 254.8cos(0) = 254.8N. = Force perpendicular to table.
Fs = u*Fv = 0.490 * 254.8 = 124.9N. =
Force of static friction.
Fk = 0.320 * 254.8 = 81.5N. = Force of
A. Fap - Fp - Fs = 0,
Fap - 0 - 124.9 = 0,
Fap = 124.9N. = Force applied = Force of sand plus bucket.
mg = Fap,
m = Fap/g = 124.9/9.8 = 12.7kg = mass of bucket plus sand.
Ms = 12.7 - 1 = 11.7kg = Mass of sand.
B. Fn = Fap - Fp - Fk,
Fn = 124.9 - 0 - 81.5 = 43.4N. = Net
a = Fn / (m1+m2) = 43.4 / (26+12.7) =
Answer This Question
More Related Questions
- Physics, Science - A 26 kg block is connected to an empty 1 kg bucket by a cord ...
- Physics - A 26.0 kg block is connected to an empty 1.00 kg bucket by a cord ...
- physics - A 28.0 block is connected to an empty 2.20 bucket by a cord running ...
- Physics - A 28.0kg block is connected to an empty 1.80kg bucket by a cord ...
- Physical Science - A 28.0kg block is connected to an empty 1.80kg bucket by a ...
- Physics - A block of mass m1 is connected to an empty bucket of mass 1.35 kg by...
- Physics - 1.A bus travels 400 m between two stops. It starts from rest and ...
- Physics - Consider the diagram of the box and bucket. If the coefficient of ...
- physics - need to know mass and acceleration of a 30.5 bloch connected to an ...
- Physics - A block of mass m1 is on top of a block of mass m2. Block 2 is ...