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100
an objects change in position relative to a reference point
What is motion?
100
the distance traveled divide by the time intervbal during which the motion occurred
What is speed?
100
A push or pull on an object to change its motion
What is force?
100
a force that opposes motion between two surfaces that are in contact
What is friction?
100
a force of attraction between two objects that is due to their masses
What is gravity?
200
the combination of all of the forces acting on an object
What is net force?
200
a measure of the gravitational force exerted on an object
What is weight?
200
the measurement of the amount of matter in an object
What is mass?
200
the measurement of both speed and direction
What is velocity?
200
the rate at which velocity changes over time
What is acceleration?
300
the force that opposed the motion of objects through the air
What is air resistance?
300
The newton is the SI unit of
What is force?
300
A change in a moving object's direction always results in a change in its
What is velocity?
300
The ______ of an object can change with its location.
What is weight?
300
This type of friction causes a sky diver's acceleration to change as she falls
What is fluid friction?
400
If 2 cars have the same mass and have the same type of engines, how could they reach different very different speeds on the same road?
One car may be designed to reduce the air resistance (fluid friction) which would make it able to reach higher speeds.
400
the force of gravity is greater between two objects that ...
have greater masses.
400
Two forces act on an object. One force has a magnitude of 10N directed toward north. The other has a magnitude of 5 N directed toward the south. The object experiences a NET FORCE of (find the difference)
What is 5 N north.
400
Why would it be easier to move a heavy object by resting one end of the object on a broom and sliding it across the floor.
there is less friction between the broom and the floor surface than there is between the bottom of the heavy object and the floor. the broom reduces the sliding friction.
400
You need to know this to calculate an object's acceleration.
What are velocity, final velocity, and the time it takes to change velocity?
500
True or false: Gravity is an attractive force.
What is true
500
Gravity can be measured with a spring scale and is measured in this unit.
What is newtons?
500
Mass, which is the amount of matter, can be measured with this device
What is a balance?
500
Describe the difference between mass and weight.
Mass is the amt of matter in an object - it remains constant everywhere. Weight is the measure of gravitational force - it may change with location.
500
The closer the objects are, the ______ the gravitational force
What is greater