Question

what is screw jack?Derive mechanical Advantage of screw Jack.

Answer 1

Machine screw jack: The worm wheel acts directly on the lead screw (lifting screw).

machinical advantage

Mechanical advantage. ... So the mechanical advantage is increased by a longer handle as well as a finer screw thread. However, most screw jacks have large amounts of friction which increase the input force necessary, so the actual mechanical advantage is often only 30% to 50% of this figure.

Answer 2

Answer:

Explanation:

A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderately heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses