All 46 Words That Will Be On Test (10-5-23) Flashcards
Acceleration
Change in velocity over time
Velocity
Speed in a given direction
Drag
Another term for air resistance or fluid friction
Interia
A tendency for an object to resist changes in motion
Weight
A measure of the gravitational forces exerted on an object
Mass
Amount of matter in an object
Force
Push or pull in a given direction
Gravity
Force of attraction between any two objects with mass
Balanced Forces
When forces acting on an object are equal size, but opposite in direction
Net Force=0
Friction
A force between two objects that are touching that opposes motion
Momentum
The force or speed at which something moves
Terminal Velocity
Final velocity an object reaches when gravity is cancelled out by a drag
Law of Conservation of Momentum
In a closed system the total amount of momentum is the same
What is the formula for momentum
Mass of an object x it’s velocity
Newton’s Cradle
A device that demonstrates the Conservation of Energy
What is the unit for momentum
kilograms - meter per second (kg-m/s)
Newton’s 1st Law
An object stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
Newton’s 1st Law
Law of Inertia
Newton’s Second Law
Force equals mass time acceleration
Newton’s Third Law
For every action. there is an equal and opposite reaction
Unbalanced Forces
Forces that produce a nonzero net force, which changes an object’s motion
Gravitational Force
The force that keeps objects from floating off into space
Static Friction
Friction that acts on objects that are not moving
Rolling Friction
Friction that occurs when an object rolls over a surface
Sliding Friction
Friction that occurs when one surface slides over another
Fluid Friction
Friction that occurs as an object moves through a fluid
9.8 m/s/s
The acceleration due to Gravity on Earth is ___?
Air Resistance
Force that opposes the motions of objects that move through the air
Unit for Mass
Kilogram (kg)
Unit for Momentum
kg x m/s
Unit for Velocity
m/s
Unit for Acceleration
m/s/s
Unit for weight
Newtons (N)
Unit for Force
N (Newtons)
Projectile
Something sent through the air
Net force
The combination of all forces acting on an object
Formula for Speed
distance/time
Formula for Distance
speed x time
Formula for Time
distance/speed
Average Speed
The overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time
Doppler Effect
An observed change in the frequency of a wave when the source or observer is moving
Instantaneous Speed
The rate at which an object is moving at a given moment in time
Centrifugal Force
An apparent force that acts outward on a body moving around a center, arising from the body’s inertia
Centripetal Force
A force that acts on a body moving on a circular path and is directed toward the center around which the body is moving
Speed
Distance traveled per unit time
RADAR
Radio Detection and Ranging
