A string passes over a frictionless, massless pulley attached to the ceiling. A

Question

A string passes over a frictionless, massless pulley attached to the ceiling. A mass m1 = 21.0 kg hangs from one end of this string, and a second massless, frictionless pulley hangs from the other end. A second string passes over the second pulley and a mass m2 = 5.0 kg hangs from one end of the string, whereas the other end is attached firmly to the ground. Assume positive accelerations are upward. (a) What is the acceleration of mass m1? Number m/s^2 (b) What is the acceleration of mass m2? Number m/s^2 (c) What is the acceleration of the second pulley?

Explanation / Answer

since the whole syaytem is fixed,

it is not moving

part a)

accleration of m1=0

part b)

acc of m2=0

part c)

acc of pulley=0

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