A force that opposes motion between two surfaces that are in contact.
What is friction
100
____________ is the rate of velocity change over time.
What is acceleration.
100
__________ is a push or pull exerted on an object in order to change the object's motion.
What is a force
100
Name an activity where friction is helpful.
What is
sample response: car tires moving a car forward
100
Which of the following does NOT describe weight?
a. changes as gravitational force changes
b. is constant everywhere in the universe
c. is a measure of gravitational force
d. can be measured in newtons
What is
b. is constant everywhere in the universe
200
Change in position relative to a reference point.
What is motion
200
Name two factors that determine speed.
What are distance and time.
200
Which of the following best determines the net force when more than one force is acting on an object?
a. a combination of all motions of an object
b. a combination of all motions of an object in 2 directions
c. a combination of all forces acting on an object
d. a combination of forces acting on an object in 2 directions
What is
c. a combination of all forces acting on an object
200
Which would NOT be a way to reduce friction?
a. using ball bearings
b. using sandpaper
c. pouring sand on ice
d. lubricating with oil
What is
c. pouring sand on ice
200
Which of the following does NOT describe mass?
a. remains constant
b. is a measure of matter
c. is a measure of gravitational force
d. is measured in kilograms
What is
c. is a measure of gravitational force
300
The speed of an object in a certain direction.
What is velocity
300
This is the difference between speed and velocity.
What is direction.
300
A (an) _________ is when the net force equals 0 N.
What is a balanced force
300
Which of these is opposed by static friction?
a. a pencil rolling on a table
b. a dog running in a yard
c. a chair sliding on a floor
d. a worker pushing on a non-moving box
What is
d. a worker pushing on a non-moving box
300
All matter has mass
a. but objects with small masses are unaffected by gravity
b. and all mass is affected by gravity
c. but only Earth's gravity affects matter
d. but only Earth's and sun's gravity affects matter
What is
b. and all mass is affected by gravity
400
This scientist is credited with discovering the concept of gravity.
Who is Sir Isaac Newton
400
Which of the following most closely illustrates motion by relating it to a reference point?
a. the hands of a clock relative to the numbers on a clock
b. the distance a car traveled relative to the time of travel
c. the speed of a bicycle relative to the direction of travel
d. the velocity change of a train relative to time
What is
a. the hands of a clock relative to the numbers on a clock
400
A (an) ________ causes an object to start moving.
What is an unbalanced force
400
Which of these is opposed by kinetic friction?
a. a book sitting on a table
b. a cat standing in a yard
c. a box sliding on a floor
d. a child leaning on a building
What is
c. a box sliding on a floor
400
The force of gravity
a. is not related to the mass of the objects
b. is only related to the mass of large objects
c. is related to weight of the objects
d. is related to the mass of the objects
What is
d. is related to the mass of the objects
500
Miss Bandow wants to create a chart of the time spent studying compared to students' test scores. Time spent studying must be the ____________ variable.
What is an independent variable
500
Which of the following best represents acceleration as presented on a graph?
a. motion change vs. time
b. distance change vs time
c. speed change vs. time
d. velocity change vs. time
What is
d. velocity change vs. time
500
Which of the following causes change in speed, direction, or both?
a. balanced forces
b. unbalanced forces
c. either balanced or unbalanced forces
d. any combination of forces
What is
b. unbalanced forces
500
What are two factors that determine the amount of friction?
What is the force and the roughness of the surfaces.
500
As the distance between two objects increases, the force of gravity between them ________.