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Velocity ratio is used to indicate the “mechanical advantage” obtained using things like gears (e.g on a bike or car); levers (e.g. crow bar, pincers or pliers); or block and tackle arrangements of rope and pulley wheels as illustrated below. . From left to right, the “velocity ratio” of each block and tackle arrangement is 2; 3; 4; 5 & 6, and in each case it is equal to the number of sections of rope supporting the moving hooked block at the bottom of the arrangement. . Velocity Ratio is given by dividing the distance moved by the motive force (applied pulling force), by the distance moved by the raised “load” that would in practice be attached to the hook. . In a loss free (frictionless) system, the mechanical advantage is equal to the velocity ratio, e.g. in the 4th diagram from the left, where the Velocity Ratio equals 5, if you pulled the rope with a force equivalent to that necessary to lift a 50 kg weight, it would be possible to raise a 250 kg weight attached onto the hook at the bottom (assuming a loss free system). .
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Thanx,bt without examples can I say that the ratio of the distance moved by the effort is 5 times greater then the load at the same time interval?
That is correct. Spot on.
Thanx.
check yahoo.com
yahoo.com
I have no clue
i dont know much about physics. i past the class with C last year,but velocity is measuring the speed of a car or roller coster…ext and velocity equals to m/s2. thats my way of understanding it. i could be wrong but thats how i understand it the whole year.i hope it helps.
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