Mechanical Comprehension – Test 1

order of magnitude is the size of a quantity as it relates to a power of 10

A newton is the SI unit of force needed to accelerate an object with a mass of 1 kg at a rate of 1 m/s²

Multiplying force is a main benefit of machines.

Inertia is the ability of an object to resist changes in its motion.

The simplest machine is a lever.

A lever's three basic parts are the fulcrum, force (or effort), and resistance.

Physics is the science concerned with describing the interactions of energy, matter, space, and time; especially interested in what fundamental mechanisms underlie every phenomenon

Conversion factor is a ratio that expresses how many of one unit are equal to another unit

Model means a representation of something often too difficult (or impossible) to display directly

The doorknob is an example of the machine called wheel and axle.

Base Quantity is a physical quantity chosen by convention and practical considerations such that all other physical quantities can be expressed as algebraic combinations of them

The two basic principles in machines are lever and inclined plane.

English units are a system of measurement used in the United States; includes units of measure such as feet, gallons, and pounds

Dynamics is the study of how forces affect the motion of objects and systems

The pivotal point of a lever is the fulcrum.

A law is a description, using concise language or a mathematical formula, of a generalized pattern in nature supported by scientific evidence and repeated experiments