What would you call a building if you compared it with a moving student?
What is a reference point
100
The two factors that determine speed are
What is distance and time
100
The force that opposes the motion between two objects that are in contact with each other is
What is friction
100
If you add oil to a car engine, are you increasing or decreasing friction?
What is decreasing friction
100
A push or a pull acting on an object best represents what concept
What is force
200
In relation to motion, the numbers on a clock can be used as a __________ ______ if compared to the hands on the clock
What is a reference point
200
The two factors that represent acceleration on a graph are
What is velocity change and time
200
The two types of friction are
What is kinetic friction and static friction
200
If you use ball bearings, are you increasing or reducing friction?
What is reducing friction
200
To calculate an object's acceleration, you need to know what three things
What is starting velocity, final velocity, and time it takes to change velocity
300
When the net forces equal 0 N, they are which type of force?
What is a balanced force
300
Dividing total distance by total time is how you calculate ___________
What is average speed
300
The two types of kinetic friction are
What is rolling kinetic friction and sliding kinetic friction
300
Is using sandpaper to smooth wood an example of increasing or reducing friction?
What is reducing
300
Is a skater who makes circles at a constant speed accelerating? Explain
Yes because the skater is constantly changing directions
400
What type of force causes an object to start moving?
What is an unbalanced force
400
A driver of an SUVdrives past a jogger on the subdivision walking path. Relative to the jogger, the SUV is traveling 15 m/s. the reference point in this situation is _____________.
What is the jogger
400
In the following example, is friction harmful or helpful: car engine parts wearing out
What is harmful
400
Does a chair sliding on a floor oppose (GOES AGAINST) static friction or kinetic friction?
What is static friction
400
A hiker's velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?
What is his speed decreased
500
Two forces act on an object. One force has a magnitude of 10 N and is directed toward the north. The other has a magnitude of 5 N directed towards the south. The object experiences a net force of _____ N ______.
What is 5 N north
500
A porch swing hanging from the porch roof is an example of this type of force
What is balanced force
500
Wen a mover puts furniture on a dolly with wheels, the type of friction the mover is using to make his job easier is __________ _________.
What is rolling kinetic friction
500
DoesDoes a child leaning on a building oppose (GOES AGAINST) static friction or kinetic friction?