Physics Quiz Flashcards
Force (F)
an interaction between two different objects that results in a push or a pull
Forces can cause… (3)
- a stationary object to move
- an object moving to stop
- moving object to change direction
two categories of forces
contact forces and field/long range forces
long range forces
forces that do not involve physical contact between two objects
contact forces
forces that result from physical contact between two objects
Gravitational Force
Fg
Magnetic force
FM
Electrostatic Force
Fe
Spring Force
Fsp
Tension Force
FT
Friction Force
Kinetic Friction (Ffk), Static Friction (Ffs)
Gravitational Force (Fg)
- a force which hold you to the surface of Earth
Magnetic Force (FM)
-non contact
Electrostatic Force (Fe)
-non contact
Spring Force (Fsp)
Tension Force (FT)
-occurs with ropes, chains, strings, etc.
-only a pull
Kinetic Friction Force (Ffk)
-friction that acts to slow down an object in motion
-sliding friction
-resistance force
Static Friction (Ffs)
- fiction that acts when an object is “on the verge” of motion
-Prevents object from moving
-not moving but you can see that it could/ would move
Centripetal Net Force
FNetc
Centripetal net force (FNetc)
the net (total) force directed toward the center of an object’s circular path
Tangential Velocity
VT
Tangential Velocity (VT)
velocity at the line tangent to the circular path
(think straight line out of circle
Centripetal Acceleration
(ac)
Centripetal Acceleration (ac)
acceleration directed towards the center of a circular path
Inertia
The tendency of an object to resist being moved or if already in motion to resist a change in speed or direction
Issac Newton’s First Law
a body at rest remains at rest. A body and motion remains in motion in a straight line at a constant speed unless acted upon by an unbalanced force
Law of Inertia
-Objects continue to move by themselves
-a force is needed to overcome friction and to set an object in motion initially
How do we measure inertia?
Mass: the about of matter in an object, different from weight
Normal Force
FN
Normal Force (FN)
A force that acts on a surface in a direction perpendicular to the surface
-molecules in a solid move
-equal force from both objects
Applied Force
(Fa)
Applied Force (Fa)
used when talking about people or unknown forces being applied
