The Importance of Load Lifting Capacity in Screw Jacks

What factors determine the maximum load lifting capacity of a screw jack?

A. The length of the handle

B. The pitch and diameter of the screw

C. The color of the screw jack

D. The material of the handle

Answer:

B. The pitch and diameter of the screw

The maximum load lifting capacity of a screw jack is determined by the pitch and diameter of the screw. A screw jack with a larger pitch and diameter will have a higher load lifting capacity.

A screw jack is a simple machine used to lift heavy loads vertically. It consists of a threaded screw mechanism and a handle. The load lifting capacity of a screw jack depends on several factors, including the pitch of the screw, the diameter of the screw, and the mechanical advantage of the jack.

The mechanical advantage is the ratio of the output force (load) to the input force (applied force). The maximum load lifting capacity of a screw jack can be calculated using the formula: Maximum Load = Mechanical Advantage x Input Force.

The pitch of the screw and the diameter of the screw determine the mechanical advantage of the jack. A screw jack with a larger pitch and diameter will have a higher mechanical advantage and, therefore, a greater load lifting capacity.