Force Diagrams
The metric unit used to measure force magnitude.
Newtons
The net force value when all acting forces are completely balanced.
0 N
The friction resisting motion when someone is sledding.
The tendency of an object to resist changes in its state of motion.
Inertia
If a swimmer pushes backward on water, the water pushes the swimmer in this direction.
Forward
The directional arrow used on force diagrams to show magnitude and direction.
Vector
Forces acting in opposite directions at 10 N left and 4 N right yield this net magnitude.
6 N
The friction encountered by wheels or round objects moving across a ground surface.
Rolling
According to Newton's 1st Law, an object at rest stays at rest unless acted on by this type of force.
Unbalanced
State Newton's 3rd Law (has to be close)
Every action has an equal and opposite reaction.
The downward force exerted on an object due to gravity. This can change on the moon.
Weight
Two forces of 15 N and 20 N pull in the exact same direction. Total net force.
35 N
Air resistance and water resistance are examples of this friction type.
Fluid
According to F=ma, increasing force applied to a fixed mass increases this variable
Acceleration
Action-reaction force pairs always act on this number of distinct objects.
Two
The upward support force perpendicular to a surface holding up an object.
Normal force
The term describing the motion that occurs due to unbalanced forces that cause an object to change speed or direction.
Acceleration
The friction force keeping a stationary object locked in place.
Static
By doubling the net force on an object does acceleration increase or decrease and by how much?
Increases by double
A massive semi-truck collides head-on with a tiny mosquito. The force exerted on the mosquito compared to the force on the semi-truck is...
Equal
The name used for a force that comes from a person or machine by pushing or pulling.
Applied force
The state of motion when net forces are zero and velocity is unchanging. (Hint: not rest/stationary)
Constant/unchanging
Ranked from strongest to weakest resistive force among dry friction types, this specific type is the strongest.
Static
By doubling the mass while keeping net force constant, does acceleration increase or decrease and by how much?
Decrease by half
A bowling ball and a marble collide. Although the impact forces are equal, the marble experiences a vastly greater change in motion because force and mass determine this variable.
Acceleration