Unit 3

Question 1

Acceleration

Answer 1

ate of change in velocity, which is the change in velocity divided by the change in time

Question 2

centripetal force

Answer 2

\sen-TRIH-puh-tl\

the center-seeking gravitational effect that causes an object to travel in a circle

Question 3

Force

Answer 3

a push or pull; any quantity that produces, or is capable of producing, motion

Question 4

Friction

Answer 4

force of resistance acting between objects in contact and tending to dampen their motion

Question 5

Inertia

Answer 5

\ih-NUHR-shuh\

an object´s resistance to a change in motion

Question 6

Magnitude

Answer 6

a numerical quantity, expressed by standard unit/s of measurement

Question 7

Mass

Answer 7

the amount of matter an object is made up of and the measure of the amount of inertia (resistance to change in momentum) the object has, measured in grams

Question 8

Net Force

Answer 8

refers to the application of more than one force on an object and, therefore, the combined effect (sum of forces) on its motion

Question 9

Speed

Answer 9

the rate at which an object changes position

Question 10

Vector

Answer 10

a number (rate) with a direction; a quantity that has both magnitude (measurable amount) and direction

Question 11

Velocity

Answer 11

\veh-LAH-suh-tee\
the rate at which an object changes position when traveling in a certain direction, expressed as a rate: the distance an object traveled from one position to the next divided by the time it took to travel the distance

Question 12

Weight

Answer 12

a measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity