intro

Question 1

speed

Answer 1

v, is the rate of change of position and is measured in meters per second, m/s.

Question 2

velocity

Answer 2

is a speed with additional information about which direction something is moving. Adds direction

Question 3

acceleration

Answer 3

is change in velocity over a given time and is measured in meters per second squared, m/s squared

Question 4

acceleration of gravity

Answer 4

For objects near surface of the earth, acceleration of gravity (g) 9.8 (m/s squared)

Question 5

force

Answer 5

is a push or shove measured in newtons. A force is required to accelerate

Question 6

weight

Answer 6

is the force that gravity causes an object to exert on the earth. Weight is measured in newtons

Question 7

density

Answer 7

the density of something is its mass divided by its volume (m/V) and is measured in kilograms per cubic meter, kg/m3 (or sometimes grams per cubic centimeter; g/cm3).

Question 8

pressure

Answer 8

Pressure is defined to be a force acting over an area; P = F/A.

Question 9

pascal

Answer 9

Pa, Newton per meter squared. a unit of pressure

Question 10

ideal gas law

Answer 10

PV=NRT, For gasses in a closed container, pressure and volume are inversely proportional (pressure increases as volume decreases). Pressure and volume are also each directly proportional to temperature (either pressure or volume or both will increase if the temperature increases).

Question 11

Bernoulli principle

Answer 11

says that if the speed of a fluid (liquid or gas) increases, the internal pressure in the fluid decreases.

Question 12

energy

Answer 12

is the capacity to do work and it is measured in joules.

Question 13

power

Answer 13

The rate at which energy is used or work done is called power and it is measured in watts

Question 14

newtons 1st law

Answer 14

Objects continue at rest or in straight-line motion with constant velocity unless an unbalanced force acts on them

Question 15

newtons 2nd law

Answer 15

Forces cause accelerations (forces do not cause velocity but changes in velocity). The

Question 16

newtons 3rd law

Answer 16

Anytime one object exerts a force on a second object, the second object exerts an equal force (but in the opposite direction) back on the first object.