Period 2-2: Rigging Basic Principles

*static loads

"In a state of inertia or rest" would describe ______

*change of direction of force

A fixed pulley is used in rigging to _________

*Vector Quantity

Any quantity with both a magnitude and a direction is called a _______

*Pounds

Force, as it applies to rigging, is generally measured in __________.

*550 FtLbs/sec

How much does 1 Horsepower equal?

*efficiency of the machine increases

Ideal mechanical advantage comes closer when the _______

*be equal

If there is no rotation in an object, the clockwise and counterclockwise forces must be ______

*Perpendicular

On a lever, both the resistance arm and the effort arm must be _______ to the force

*Hydroulic Systems

One of the newest methods for lifting loads during rigging operations is _______

*parallel

Parallel forces are two or more forces whose action lines are ________ but not in a straight line

*lowering the center of gravity and increasing the base area

Stability of an object can be increased by ______

*Hydroulic Systems

The increase pressure of liquid which applies force is used in?

*sum of the two forces

The resultant of two concurrent in the same direction 0° apart is the same as the ________

*Concurrent Forces

Two or more forces acting at the time and at the same point are termed _____

*20'

Using a single part line with a fixed pulley, how much rope must be pulled up to raise the load 20'?

*46'

Using a single part line with a movable pulley, how much line must be pulled to raise a load 23'?

*Friction

What increases the forces necessary to move a load?

*Jacks

What tool can be used for positioning and leveling light loads?

*Wedge

What tool is driven in between two bodies in order to separate?

*Lever

What tool is the most widely used rigging tool in the industry today?

*Fulcrum

What would the phrase, fixed point, most likely match with the example?

*Increases

When force is needed to move a load, friction ______

*neither linear or rotational motion

When the state of static equilibrium exists, thee is _____

*Sliding Friction

When the weight of two loads being moved are the same, which is the stronger friction?

*the direction of the greater force

When two concurrent forces work in opposite directions (180° apart), the resultant acts in _________

*eliminate all friction

With mechanical advantage, you can do all the following except ________