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100
a push or pull that always acts on an object
What is a force?
100
the speed of an object in a particular direction
What is velocity?
100
the force of attraction between objects
What is gravity?
100
The difference between speed and velocity
What is velocity involves direction, while speed does not?
100
to produce a change in motion, a force must be
What is unbalanced?
200
a change in a moving object's speed or direction
What is acceleration?
200
an object that appears to stay in place and that helps you detect motion in another object
What is a reference point?
200
Which is an example of friction that is helpful a. car engine parts wearing out b. tires moving a car forward c. holes developing in your socks d. the erosion of soil by wind
What is tires moving a car forward?
200
Mass is a. different on the moon than on Earth b. a measure of gravitational force c. a measure of the amount of matter d. measured in newtons
What is a measure of the amount of matter?
200
When a mover puts furniture on wheels, which type of friction is the mover using to make the job easier
What is rolling kinetic friction?
300
A force that always acts to oppose motion
What is friction?
300
To calculate an object's average acceleration, you need to know: starting velocity, distance traveled, and speed starting point, endpoint, and the object's mass starting velocity, final velocity, and time it takes to change velocity average speed, distance, and the time it takes to change velocity
What is starting velocity, final velocity, and the time it takes to change velocity
300
What is the net force on an object when you combine a force of 10 N north with a force of 3 N south
What is 7 N north?
300
Dividing the total distance divided by the total time is how to calculate
What is speed?
300
Friction occurs because of
What is the roughness of any object's surface?
400
a measure that does not change when an object's location changes
What is mass?
400
The gravitational pull is greater between two objects that a. have greater masses b. have rougher surfaces c. are farther apart d. are moving at greater speed
What is have greater masses?
400
A biker's velocity begins at 1.9 m/s uphill and changes to 1.4 m/s uphill. How do you know that the hiker has a negative acceleration?
What is the speed decreased?
400
In which of following is a skater NOT accelerating a. going straight while speeding up b. going straight at a constant speed c. making circles at constant speed d. going straight while slowing down
What is going straight at a constant speed?
400
If a student has a weight of 480 N om Earth, what is the student's weight on the moon? (Moon's gravity = 1/6 of Earth's gravity)
What is 80N?
500
the measure of the gravitational force exerted on an object
What is weight?
500
An unbalanced force can cause an object's motion to change by a. changing direction or speed; starting but not stopping motion b. changing direction or speed; starting or stopping motion c. changing direction or speed; stopping but not starting motion d. changing direction or speed only
What is changing direction or speed; starting or stopping motion?
500
The law of universal gravitation says that gravitational force is related to what 2 things
What is mass and distance?
500
If you were to graph speed, what two factors would you use
What is distance and time?
500
If you were to graph acceleration, which two factors would you use
What is velocity and time?