GEN PHYSICS EXAM

Science

A systematized body of knowledge which is based on facts and gathered through observations, experimentation and other related experiences.

Social, Applied, and Natural Science

What are the 3 branches of science?

Social Science

Deals with human behavior which is focused on the social and cultural aspects of society.

Applied Science

The application of theoretical sciences.

Natural Science

It deals with the understanding of nature.

Physics

Branch of science concerned with using extremely long and complicated formulas to describe how a ball rolls.

Physics

Branch of science concerning the study about natural phenomena and properties of matter.

Physikos

What is the Greek word for physics?

Mass

The amount of matter in an object.

Weight

The force with which the earth pulls on an object.

Force

A push or a pull.

Energy

The ability to do work (to apply a force and move an object).

Scientific Theory

A well-tested explanation for a set of observations.

Scientific Models

A representation of an object or an event that helps us visualize and understand them.

Law or Principle

A hypothesis that has been repeatedly tested and not contradicted.

Law or Principle

Change or are abandoned when contradicted.

Scientific Fact

Observation may change.

1st Law of Motion

An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force.

Inertia

The tendency of an object to resist changes in its velocity: whether in motion or motionless.

More mass and Greater Inertia

Objects having ___ ____ will have _______ _______.

Friction

The resistive force that opposes the motion or attempted motion of two objects or substance in contact with each other.

2nd Law of Inertia

The net force of an object is equal to the product of its mass and acceleration, or F=ma.

3rd Law of Inertia

For every action, there is an equal and opposite reaction.

Measurement

Comparison to a standard. Most often that standard is an excepted standard such as a foot of length, liter of volume or gram of mass.

English and Metric

What are the 2 system of Measurement?

International System of Units (SI)

The modern form of the metric system. It comprises a coherent system of units of measurement built around seven base units.

Kelvin, Second, Meter, Kilogram, Candela, Mole, and Ampere

What are the 7 SI Base Units?

Thermodynamic Temperature and K

Quantity and Unit Symbol of Kelvin?

Time and s

Quantity and Unit Symbol of Second?

Length and m

Quantity and Unit Symbol of Meter?

Mass and kg

Quantity and Unit Symbol of Kilogram?

Luminous Intensity and cd

Quantity and Unit Symbol of Candela?

Amount of Substance and mol

Quantity and Unit Symbol of Mole?

Electric Current and A

Quantity and Unit Symbol of Ampere?

Derived Units

Formed from multiplication and division of the seven base units and other derived units and are unlimited in number.

Accuracy

The closeness of the experimental value to the true value.

Precision

The closeness of measurement from one another.

Exact and Degree of Uncertainty

No measurements are _____. There is always a _____ __ ____________.

Limitation, Skill, Irregularities, and Condition of Environment

Why are there uncertainties?

Projectile

Any object that continues in motion by its own inertia and is influenced only by the downward force of gravity and air resistance.

Trajectory

Horizontal Motion

If there is no force acting on an object, then it will continue moving at a constant speed in the same direction.

Free Fall Revisited

An object in free fall is only acted on by gravity.

Scalar

A quantity that has magnitude and usually a unit of measure.

Vector

Is a quantity with magnitude, direction and usually a unit of measure.

Arrowhead, Length of the Arrow, and Tail

What are the 3 important parts of Vector?

Arrowhead

Indicates the direction of the vector.

Length of the Arrow

Represents the magnitude of the vector.

Tail

Represents the origin of the vector.

Resultant

The sum of two or more vectors.

Resultant Vector

The vector that 'results' from adding two or more vectors together.

Contact Force

A force that can cause or change motion of an object by touching it.

Non-Contact Force

Force that results when the two objects are not in physical contact with each other, yet are able to exert a push and pull.

Applied Force

A force typical push or pull, pushing a door open, pulling a rope.

Normal Force

The support force exerted upon an object that is in contact with another stable object.

Air Resistance

A type of frictional force that acts upon objects as they travel through the air.

Tension

The force applied to string, rope, chain, or cable.