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Unit 3: Newton's Law
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Gravity
Terms in this set (35)
Acceleration is caused by
unbalanced forces
When forces are balanced
velocity does not change
An object moving in space far away from any object it will
Continue moving until an outside force acts on it
Newton's 1st Law
Object will remain at rest or in motion in a straight line unless acted upon by an external force
What is the Net Force when forces are balanced?
Zero
Inertia
Property of matter that resists change in motion.
More mass means _____ inertia
More inertia
Less mass means____ inertia
Less inertia
Net Force
The sum (total) of all forces acting on an object
Direction of friction force
opposite direction of the motion.
Normal Force (F normal)
Force of the surface pushing up on an object
Force of gravity (F gravity)
Force of Earth's gravity pulling down
Force of friction (F friction)
Force of a surface working opposite the motion.
If an object is slowing down on a floor which force is larger?
The force of friction is larger than the applied force
Force of air resistance
If slowing down air arrow is larger going up. If speeding up the gravity arrow is larger.
Applied Force
Force of push or pull on an object
How do you find the Net Force
Add the forces if same direction, subtract if they are in opposite directions
How do you draw a free body diagram?
Draw all the forces and LABEL them.
Units for Force
Newtons (N)
Increase in force causes....
Increase in acceleration
If two objects are pushed with the same force, this object will accelerate more.
the object with less mass.
Two objects with the same mass are pushed with different amounts of force. The object pushed with the most force...
has the largest acceleration
The smaller the force
then less acceleration
Units for mass
kg
Units for acceleration
m/s2
in F=ma, the m stands for
Mass
in F=ma, the a stands for
acceleation
in F=ma, the F stands for
Force
Forces come in sets of
2
Relationship between a action and reaction force
equal and opposite
In unbalanced forces
speed and.or directionchanges
In w=mg what does the w stand for
Weight
what is g in w=mg?
g is the acceleration due to gravity. On Earth it is g=9.8 m/s2
T of F Mass is the same everywhere
True, mass is the same everywhere
T or F Weight is the same everywhere
False, weight changes depending on the size of the planet. More gravity more weight.
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