An object is accelerated by a net force in which direction?
in the direction of the force
Which type of collision occurs when a baseball bat hits a baseball?
elastic
If you exert a net force of 8N on a 2-kg object, what will its acceleration be?
4 m/sec/sec
Objects at rest stay at rest---until acted on by an ____________force.
unbalanced
You hit a wall with a stick. The equal but opposite reaction is _______.
the wall pushes back on the stick
What combination of units is equivalent to the newton (N)?
kg x m/sec/sec
A vector pointing north, east, right or up is a _________ vector.
positive
A _________ force is the total force felt by an object.
Net
Newton's first law of motion states that an object at rest or moving at a constant speed in a(n) _______ will continue to do so until a force acts on it.
straight line
A vector pointing south, west, down or left is a _______ vector.
negative
vectors can be ______ or _________ because of position or direction.
positive or negative
Forces that are equal in size (magnitude) and opposite in direction are ___________ forces.
Balanced Forces
NET force (Fnet) =
sum of all the forces
In order to know how a force will affect an object, you must know the _______.
direction
If there is a change in motion, acceleration and the net force does NOT equal zero, then the forces are __________.
unbalanced
Objects in motion stay in motion at the same speed and in the same direction (no acceleration)---until acted on by an _____________ force.
unbalanced
A quantity with magnitude only
scalar
Newton's Second Law says that an object acted upon by a net force will accelerate in the direction of the force according to the equation _______
A=F/M
If the forces acting on an object are unbalanced, the net force is NOT ________.
Zero
Which term explains why a crash-test dummy lunges forward during collision?
inertia
In order to be ______________ forces, their effects must cancel each other out and not cause a change in an object's motion.
Balanced
If vector arrows are in opposite directions, and the magnitudes are NOT labeled as (+) or (-), _________the magnitudes to find the resultant vector.
subtract
A quantity with both magnitude and direction.
Vector
Forces applied to an object that will change its speed, direction, or both are ___________ forces.
unbalanced
If a net force acts at an angle to the direction an object is moving, the object will follow a(n) ___________ path.
curved
When forces are balanced there is ________ change in motion.
no
You are riding on a bike. In which of the following situations are the forces acting on the bike balanced?
you pedal at constant speed
When forces are balanced the net force equals _______.
zero
Newton's third law can be stated as "For every action, there is a(n) ______ reaction".
equal and opposite
How can you tell magnitude when their is no value given?
length of the arrow
If vector arrows are in the same direction, ___the magnitudes to find the resultant vector.
add
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