Three objects with masses m 1 = 6.0 kg, m 2 = 10.0 kg, and m 3 = 19.0 kg, respec

Question

Three objects with masses m1 = 6.0 kg, m2 = 10.0 kg, and m3 = 19.0 kg, respectively, are attached by strings over frictionless pulleys, as indicated in Figure P5.32. The horizontal surface is frictionless and the system is released from rest. Using energy concepts, find the speed of m3 after it moves down a distance of 3.5 m.
m/s

Three objects with masses m1 = 6.0 kg, m2 = 10.0 kg, and m3 = 19.0 kg, respectively, are attached by strings over frictionless pulleys, as indicated in Figure P5.32. The horizontal surface is frictionless and the system is released from rest. Using energy concepts, find the speed of m3 after it moves down a distance of 3.5 m.

Explanation / Answer

counter force of either side of m2=60 and 190

so m2 willmove right side of frame

as m2 willmove right with same speed m3 willmove doun as attach by string

f=ma

a=130n/19=6.84m/s^2

now v^2=u^2+2as

v^2=47.89

v=6.65

same by potential energy=mgh

wear h=3.5m

p energy is same as speed =6.65m/s

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