Manual Application of Impulses while Tractionless

Abstract

The percentage of 20 naïve subjects who, while tractionless in a horizontal plane and anchored by one handhold, push in or pull out a plunger in one motion against various frictional forces and travel distances, decreases directly as the force and distance required. With large-force impulses, the impulse is linear and the situation can be described by the impulse = momentum theorem) ^t ₀Fdt= mv ₁-mv ₀. The shape of the impulse is saw-toothed, and its area approximated by taking three-fourths of the area of a rectangle whose base is the duration, and height, the force of the impulse. For this experiment, the maximum duration of an effective impulse for a required force of 40 lb is 0.5 sec for a push-in, and 0.3 sec for a pull-out impulse.