Question

the velocity ratio of a certain lifting lifting machine is 50. determine the effort required to lift a load of 1500 N. if efficiency of the machine is 40%​

Answer 1

Answer:

The velocity ratio will be 12%

Answer 2

Answer:

The effort required is 75N.

Step-by-step explanation:

We know that efficiency of a lifting machine is given by

                          efficiency = output / input

Here output is the Load x distance moved by the load = P x X

and , input is the Effort x distance moved by the effort = W x Y

So, efficiency = P x X / W x Y

Velocity ratio = distance moved by the effort / distance moved by load    

so, Velocity ratio = Y/X

Given that,

Velocity ratio = 50

Load (P)  = 1500

Efficiency = 40%    

Putting the values in efficiency equation we get

efficiency = P x X / W x Y

.40 = 1500 / L x 50

W = 75

Hence, the effort is 75N.