Physics study guide

What are physical objects composed of?

matter

What instrument is used to determine the specific gravity of a liquid

hydrometer

Torque is defined as a force applied over a distance

True

Torque is calculated by multiplying power by distance

false

A machine is a tool that allows work to be performed

true

Would a movable pulley provide a mechanical advantage of 2

yes

what would be considered compression

squeezing, downward force

what is the name of the point where a lever rotates?

fulcrum

name the ways heat can be transferred

radiation, conduction, conviction

list three situations that demonstrate potential energy

spring being compressed, stretched rubber band, and fueled stored in an airplane tank

Which two measurements are needed to determine a substance’s density?

weight and balance

What factor controls how much water vapor air can hold?

temperature and pressure

What control surface affects movement around the longitudinal axis?

ailerons and roll

Does a stabilator eliminates the need for a separate elevator?

yes

Name the forces that influence an aircraft in fight

drag, weight, thrust, and lift

Who is credited with developing Bernoulli’s principle?

David Bernoulli

Strain occurs when a force causes an object to deform

yes it does

Which type of air has a lower density than the current air?

humid

As the velocity of a fluid increases, what does the pressure do?

decrease

What is the term for when airflow separates and lift is lost?

stall 

What do you call the angle between the wing’s chord line and the direction of the relative wind?

angle of attack

Which section of the wing would typically experience stall first?

root

What design feature causes a specific part of the wing to stall before the rest?

stall strips

What is the benefit of having only part of the wing stall first?

ailerons

During autorotation, in which direction does air flow through the helicopter’s main rotor?

vertically up through the blade

What control adjusts the pitch of all main rotor blade stimultaneously?

Collective

Aspect ratio is defined as the wingspan divided by the average chord length

Yes