Level 120 Level 122
Level 121

## Ignore words

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Newton's second law
Acceleration is produced when a force acts on a mass, the greater the mass, the more force is required to accelerate the object.
F = ma
Formula for Newton's Second Law
the acceleration increases
If you increase the force
the acceleration decreases
if you increase the mass
motion
An object is moving if its position relative to a fixed point is changing.
Centripetal Force
A force directed towards the center of a circle that causes an object to follow a circular path
50 N
What force is needed to accelerate an object 5 m/s if the object has a mass of 10 kg?
unit of force
What is a Newton?
kg x m/s2
What is a Newton really?
the center
Which direction does centripetal force point towards?
Newton's Third Law
All forces come in pairs. The two forces in a pair act on different objects and are equal in strength and opposite in direction.
action force = jellyfish pushing on the water
What are the action / reaction force pairs associated with jellyfish motion?
different objects
action / reaction forces act on
a single object
balanced forces act on
momentum
(p) vector quantity describing the quantity of motion or inertia in motion. Recognizes that both mass and velocity have a part in the motion of an object and is proportional to both (is zero …
because it involves mass
momentum is similar to inertia
momentum is different than inertia
because it also involves speed
momentum formula
momentum = mass x velocity
conservation of momentum
the total momentum of a system of objects does not change, as long as no outside forces are acting on that system.