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force
For every action ______________ there is an equal and opposite reaction ___________. (one word)
size
Magnitude means (size/direction).
equal
In every action-reaction force pair, the FORCES are _______ in size (magnitude).
direction
In every action-reaction force pair, the forces are equal in magnitude, but opposite in ________.
3rd
Law of action-reaction is Newton's _______ law of motion
pairs
Forces always occur in ________, groups of two.
simultaneously
The action-reaction forces occur ___________ (at exactly the same time)
same time
simultaneous means exactly at the___________ __________
action-reaction
Newton's 3rd Law of Motion is also called the law of ___________.
magnitude
In Newton's 3rd law of motion, the forces are equal in __________
2000 N
A smart car runs into a huge pickup truck with 2000 N of force. The truck hits the little smart car with __________ of force
gases
A rocket launches (pushes) off of its own
400 N
A 90 kg box runs into a 20 kg box with 400 N of force. The 20 kg hits the 90 kg box with _______ of force.
mass
The amount of matter an object is made of is its __________
kg
The SI unit of mass
N
The SI unit of weight (because weight is a force)
weight
The pull of gravity on an object's mass defines __________
gravity
Weight is a force because something has weight only due to _________
False
Weight and mass are the same thing. True or False
opposite
In action-reaction force pairs, the forces are always in the _________ direction.
2
In this picture, the man in the middle is involved in how many force pairs?
contact
To find force-pairs, look for the points of ______.
foot
In kicking a soccer ball, the action-reaction is foot on ball, ball on ________.
