- #26

rl.bhat

Homework Helper

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I'm sorry,rl.bhat.I still don't get it.

for B

final length= b+d

initial lenght = b

so substracting gives me -b

and for C,

final length = d-c

initial length = c

and subtacting to find the net change in segment gives me = d-2c ?

In the problem it is said that B moves 2.44 m in 2 seconds.

In 2.44 m(b) includes fall of the mass B, which changes the

**length of the rope segment**, plus fall of the pulley D(d),

**which does not change the length of the rope segment**

To calculate the net change in the length of the rope, we must know the change in the rope segment of the mass B alone.And that is b - d