the straight-line distance between two points; a measurement of the net change in position
displacement
the length along a path between two points
distance
a measurement that has both magnitude (a numerical value) and direction
vector
To obtain the number of meters from a distance measured in centimeters, you must multiply/divide by the number 100/12/10/5,280.
divide, 100
To determine the number of meters from a distance measured in kilometers, you must multiply/divide by the number 10/5,280/1,000/100.
multiply, 1,000
When using the metric system, conversions which require division can be made by moving the decimal to the _____.

left

right

left
As a vector, displacement has which qualities?

magnitude only

direction only

magnitude and direction

neither magnitude or direction

magnitude and direction
A child and her mother are at the park. The child walks around the rectangular park while her mom waits on a bench. The child returns to the bench, finishing her walk at the same place she started. The park is 411 meters wide and 475 meters long. What distance did the child walk?

195,000 m

886 m

1,772 m

0 m

1,772 m
A child and her mother are at the park. The child walks around the rectangular park while her mom waits on a bench. The child returns to the bench, finishing her walk at the same place she started. The park is 411 meters wide and 475 meters long. What was the displacement of the child?

64 m

886 m

1,772 m

0 m

0 m
Patricia roller skates 0.50 kilometers, straight north to the library. Then she walks 0.25 kilometers to her friend’s house, which is straight north of the library. What is Patricia’s displacement?

0.75 km, north

0.25 km, north

0 km

0.75 km

cannot be determined because she roller skated on one section and walked on another

0.75 km, north
Ed rolls a ball forward across the floor. It hits a wall 12 meters away and rolls back along the same path. It stops 5 meters from the wall. What is the displacement of the ball?

17 meters forward

5 meters forward

7 meters forward

12 meters forward

7 meters forward
in any right triangle, the square of the hypotenuse is equal to the sum of the squares of the sides
Pythagorean theorem
measure of the rate at which an object changes position
speed
rate and direction of an object’s motion
velocity
What is speed?

rate of motion

rate and direction of motion

the direction of motion

the force of motion

rate of motion
Which of the following is an appropriate unit for speed?

miles/hour

meters/second

blocks/min

newtons/sec

miles/hour, meters/second, blocks/min
the rate at which an object changes its velocity
acceleration
an acceleration which is directed towards the center of a curved path which causes an object to follow the curved path
centripetal acceleration
the continuous change of position of a body with respect to a second body or reference point
relative motion
In order for an object to accelerate, friction/a swing/a force/gravity must be applied.
a force
A car’s acceleration is negative. This means the car is _____.

slowing down

speeding up

changing direction

traveling in a circle

slowing down
If an object is accelerating, then what other possible inferences can be made?

Select all that apply.

Object’s speed is changing

The object’s mass is changing

The object’s direction is changing

The object’s velocity is changing

1,3,4
a line that best represents the trend of the data
line of best fit
the change in the y variable compared to the change in the x variable between two points on a graph
slope
a quantity that changes during an experiment
variable
Choose all that apply. When creating a graph, you should:

determine the x- and y- variables

label the scale on the x- and y- axes

plot the data points

draw a line of best fit to represent the data trend

1,2,3,4
The slope of a(n) _____ graph represents speed.

distance-time

velocity-time

displacement-time

acceleration-time

distance-time
The slope of a(n) _____ graphs represents acceleration.

distance-time

velocity-time

displacement-time

acceleration-time

acceleration
the principle which states that the total momentum of a system is constant
law of conservation of momentum
the mass of an object multiplied by its velocity
momentum
Which of the following is not a vector?

velocity

momentum

acceleration

mass

mass
Which of the following will change the momentum of a moving object?

Select all that apply.

a change in mass

a change in volume

a change in velocity

a change in acceleration

1,3
The law of conservation of momentum states that the total momentum of a system _____.

increases

decreases

remains constant

remains constant
a straight line from corner to corner in a parallelogram
diagonal
an effect that changes the motion (velocity or direction) of an object with mass
force
the force that objects exert on each other because of their mass
gravity
the unit of force in the metric system
newton
the net magnitude and direction of two or more combined vectors
resultant
a quantity that has magnitude only
scalar
A push or a pull is called _____.

work

a scalar

a force

velocity

a force
The force of attraction that the earth exerts on all objects is called _____.

mass

weight

gravity

inertia

gravity
A quantity that has magnitude only is a _____.

scalar

diagonal

vector

scalar
The metric unit of force is the _____.

newton

pound

kilogram

watt

newton
The scientist who discovered the laws of motion was _____.

Aristotle

Albert Einstein

Galileo Galilei

Isaac Newton

Isaac Newton
The magnitude of a vector is indicated by the _____ of the arrow.

length

direction

angle

point

length
When vectors are added or subtracted, the net force is called the _____.

sum

solution

resultant

vector quantity

resultant
The resultant of two vectors acting at a 90°-angle can be determined from the _____ of the rectangle.

area

size

magnitude

diagonal

diagonal
the ratio of the force necessary to move an object (or keep it moving) and the normal force
coefficient of friction
friction between a solid and a liquid or gas
drag
a force that resists motion
friction
the force that presses two surfaces together and is directed perpendicular to the contact surface; on a level surface, its magnitude is equal to the force of the object’s weight but in the opposite direction
normal force
force that opposes a rolling object
rolling friction
force that opposes a sliding object
sliding or kinetic friction
force that opposes the start of motion
starting or static friction
a force that develops when a mass is accelerated by gravity; stated as Fw = mg
weight
The force that resists moving one object against another is _____.

friction

push

energy

work

friction
Friction is generated when _____ interact with each other on sliding surfaces.

solids

molecules

forces

fluids

molecules
All of the following show friction as a useful force, except _____.

the heat energy produced when two surfaces rub together

having to push a rough and heavy box across the floor to move it

the friction between your feet and the floor keeping you from slipping

the tread on tires helping the moving vehicle slow down and stop when necessary

2
If the force applied to an object is not greater than the starting friction, what will happen to the object?

The object will begin to move but will quickly slow down.

The object will move in the opposite direction of the force applied.

The object will move with the magnitude of the force applied.

The object will not move.

4
If a block is already put in motion, which of the following statements apply?

The force needed to overcome the sliding friction is less than the force needed to overcome the starting friction.

The force needed to overcome the sliding friction is equal to the force needed to overcome starting friction.

The force needed to overcome the sliding friction is greater than the force needed to overcome the starting friction.

No force is needed to overcome sliding friction once force has been applied to overcome the starting friction.

1
If the mass of an object increases, predict what will happen to the coefficient of sliding friction.

The coefficient of sliding friction will increase.

The coefficient of sliding friction will decrease.

The coefficient of sliding friction will stay the same.

The coefficient of sliding friction will decrease by half

2
In general, the friction involved in sliding an object is greater thanequal toless than the friction involved in rolling an object.
greater than
What kind of friction exists between solid objects moving in water?

static friction

sliding friction

rolling friction

drag

drag
The force that opposes the start of motion is referred to as _____.

starting friction

sliding friction

static friction

kinetic friction

1,3
The resistance to an object being pulled over a surface is called _____.

starting friction

sliding friction

static friction

kinetic friction

2,4
the acceleration experienced by masses in a gravitational field, the value of which varies with the strength of that field
acceleration due to gravity (g)
unit of measurement obtained by combining metric units
derived unit
a description applied to the relationship between variables: when one variable increases, the other also increases
directly proportional
the property of matter that resists change in velocity
inertia
a description applied to the relationship between variables: when one variable increases, the other decreases
inversely proportional a description applied to the relationship between variables: when one variable increases, the other decreases