Two blocks are connected over a massless, frictionless pulley (figure below). Th

Question

Two blocks are connected over a massless, frictionless pulley (figure below). The mass of block 2 is 7.5 kg, and the coefficient of kinetic friction between block 2 and the incline is 0.28. The angle ? of the incline is 23. Block 2 slides down the incline at constant speed. What is the mass of block 1?

Two blocks are connected over a massless, frictionless pulley (figure below). The mass of block 2 is 7.5 kg, and the coefficient of kinetic friction between block 2 and the incline is 0.28. The angle ? of the incline is 23½. Block 2 slides down the incline at constant speed. What is the mass of block 1?

Explanation / Answer

for m1

T - m1g = 0

for m2

m2gsin23 - mgcos23 - T = 0

T = 9.77 N

m1 = T/g = 0.997 Kg

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