Question

the velocity of a simple screw jack L as the length of handle and p as the pitch screw jack ​

Answer 1

Explanation:

Mechanical advantage of a machine (M.A.): It is the ratio of the weight lifted (W) to the effort applied (P).

1. M.A. = W/P

1. Velocity ratio (V.R.): It is the ratio of the distance (y) moved by the effort to the distance (x) moved by the load.
2. V.R = y/x

Input of a machine: It is the work done on the machine. In a lifting machine, it is measured by the product of effort and the distance through which it has moved (i.e., P.y).

Output of a machine: It is the actual work done by the machine. In a lifting machine it is measured by the product of the weight lifted and the distance through which it has been lifted i.e., (W.x).

Efficiency of a machine (η): It is the ratio of output to the input of a machine.

η = Output/Input

Ideal machine: A machine is said to be idfeal if its efficiency is 100%. In this case, output is equal to input.

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