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26 terms

Newtons first and Second law of motion

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True
When the net force is zero, the forces on an object are balanced.
False
If two forces are in the same direction, they cancel each other out.
False
Any time the forces are unbalanced, an object will remain at rest.
True
According to Newton's first law of motion, an object at rest will stay at rest until a net force acts upon it.
True
According to Newton's first law of motion, an object moving at a constant speed in a straight path will continue to do so until a net force acts upon it.
True
Friction brings most moving objects to a stop.
True
Friction will never speed up an object.
False
Galileo believed that the natural state of an object was to be at rest.
False
If you slide a bag of groceries along a countertop, you must first overcome rolling friction.
True
Walking would be impossible without rolling friction.
False
Rolling friction always reduces the net force acting against an object's motion to zero.
False
Sliding friction is caused by the attraction between two surfaces.
True
If an objects accelerates, a push or pull must be acting on it.
True
If an object is not moving, the net force working on it is zero.
True
Friction can be reduced but never eliminated.
gravity
___ exists between any two objects that have mass.
acceleration
___ occurs any time an object speeds up, slows down, or change direction.
force
In the formula a=Fnet divided by m, the Fnet stands for___.
normal force
When you sit in a chair, it exerts ____ against you.
newtons
Force is measured in ____.
attraction
A gravitational ________exists between you and every object in the universe.
mass
In the formula a= Fnet divided by m, the m stands for ____.
velocity
____descibes how fast an object is moving and in what direction.
accelerate
An object acted upon by a force will ________in the direction of the force.`
motion
which of the following changes when an unbalanced force acts on an object?
sliding friction
which of the following is the force that slows a book sliding on a table