Chapter 12 Vocab Flashcards
(22 cards)
Newton
SI unit for pressure
Net force
Overall force acting on an object after all the forces are combined
Friction
Force that opposes the motion of objects that touch as they move passed each other.
Static friction
Friction force that acts on objects that are moving
Sliding friction
Force that opposes the direction of motion of an object as it slides over a surface
Rolling friction
Friction that acts on rolling objects.
Fluid friction
Opposes the motion of an object through a fluid
Air resistance
Fluid friction acting on an object moving through the air
Gravity
Force that acts between any two masses
Terminal velocity
The constant velocity of a falling object when the force of air resistance equals the force of gravity
Projectile motion
Curved path of an object in free fall after it has given an initial forward velocity
Inertia
Tendency of an object to resist a change in motion
Mass
Measure of the inertia of an object and depends on the amount of matter the object contains
Weight
The force of gravity acting on an object
Momentum
Product of an objects mass and velocity
Law of conservation of momentum
No net force acts on a system, then the total momentum of the system doesn’t change
Electromagnetic force
Associated with charged particles
Strong nuclear force
Powerful force of attraction that acts only on the neutrons and protons in the nucleus holding them together.
Weak nuclear force
An attractive force that only acts over a short range
Gravitational force
An attractive force that acts between two masses.
Centripetal force
Center-directed force that continuously changes the direction of an object to make it move in a circle.
Force
Push or pull that acts on an object
