Automobile Scissors-Jack Loading Analysis

Problem:

Given:

Assumptions:

Determine the forces on the elements of the scissors jack in the po-

sition shown in Figure 3-5.

The geometry is known and the jack supports a force of P = 1 000 lb

(4 448 N) in the position shown.

The accelerations are negligible. The jack is on level ground. The

angle of the elevated car chassis does not impart an overturning

moment to the jack. All forces are coplanar and two dimensional.

A Class 1 load model is appropriate and a static analysis is acceptable.

and ?