Unit 1--Fall

Question 1

change of position and direction

Answer 1

motion

Question 2

total length of path

Answer 2

distance

Question 3

distance and direction of an object’s change in position from the starting point, reference point

Answer 3

displacement

Question 4

distance an object travels per unit time; distance divided by time

Answer 4

speed

Question 5

total distance traveled divided by the total time of travel

Answer 5

average speed

Question 6

speed at a given point in time

Answer 6

instantaneous speed

Question 7

speed of object and direction of motion

Answer 7

velocity

Question 8

rate of change of velocity; difference between ending velocity and beginning velocity divided by the time taken to make the change
CAN BE constant speed with change in direction

Answer 8

acceleration

Question 9

speeding up; ending velocity is higher than initial velocity

Answer 9

positive acceleration

Question 10

slowing down; final velocity is lower than initial velocity

Answer 10

negative acceleration

Question 11

two or more forces act on an object at the same time; combined forces

Answer 11

net force

Question 12

push or pull

Answer 12

force

Question 13

equal forces that act in opposite direction; net force of zero

Answer 13

balanced forces

Question 14

tendency of an object to resist a change in motion

Answer 14

inertia

Question 15

motion of an object does not change unless an unbalanced net force acts on the object; object in motion stays in motion and/or object at rest stays at rest unless acted on by outside force

Answer 15

Newton’s First Law of Motion

Question 16

acceleration of an object is in the same direction as net force on object; acceleration can be calculated by dividing force by mass.

Answer 16

Newton’s Second Law of Motion

Question 17

force opposes sliding motion of two surfaces in contact with one another

Answer 17

friction

Question 18

frictional force that prevents two surfaces from sliding past each other; force isn’t large enough to break microwelds

Answer 18

static friction

Question 19

force that opposes the motion of two surfaces sliding past one another; microwelds are breaking and reforming as object slides along

Answer 19

sliding friction

Question 20

forces opposes motion of objects that move through air; causes objects to fall at differenct speeds

Answer 20

air resistance

Question 21

highest speed a falling object will reach

Answer 21

terminal velocity

Question 22

attractive force between all objects with mass

Answer 22

gravity

Question 23

gravitational force exerted on an object

Answer 23

weight

Question 24

net force exerted toward the center of a curved path

Answer 24

centripetal force

Question 25

one object exerts a force on a second object, the second object exerts a force of equal size and opposite direction as the first object

Answer 25

Newton’s Third Law of Motion

Question 26

mass times velocity of an object

Answer 26

momentum

Question 27

energy of moving object due to motion

Answer 27

kinetic energy

Question 28

stored energy due to position

Answer 28

potential energy

Question 29

unit energy is measured in

Answer 29

joule

Question 30

ability to cause change; to do work

Answer 30

energy

Question 31

energy stored in an object that can stretch or compress

Answer 31

elastic potential energy

Question 32

energy stored in chemical bonds

Answer 32

chemical potential energy

Question 33

energy stored by objects due to position above Earth’s surface

Answer 33

gravitational potential energy

Question 34

sum of potential and kinetic energy in a system

Answer 34

mechanical energy

Question 35

energy can be cannot be created nor destroyed; it can only change form

Answer 35

Law of Conservation of Energy