Science-Motion Flashcards
(22 cards)
Distance
To describe how far something has moved. Longer distances are measure in kilometers.
Displacement
The distance and direction of an objects change and position from the starting point.
Speed
The distance an object travels per unit of time.
Average Speed
The total distance traveled divided by the time of travel. Also can be calculated using the relationships among speed, distance, and time.
Instantaneous Speed
The speed at at given point in time. The speed shown on a speedometer is the Instantaneous Speed.
Velocity
The speed of an object and the direction of it’s motion.
Acceleration
The rate of change of velocity. When the velocity of an object changes,the object is accelerating.
Net Force
When two or more forces act on an object at the same time, the forces combine to form the net Force.
Force
A push or pull upon an object resulting from the object’s interaction with another object
Balanced Forces
Forces on a object that are equal in size opposite in direction.
Inertia
The tendency of an object to resist any change in it’s motion and when an object is moving.
Newtons second law of Motion
Force= the mass of an object x acceleration.
Friction
The force that opposes the sliding motion of two surfaces that are touching each other.
Static Friction
The frictional force that prevents two surfaces from sliding past each other.
Sliding Friction
The force that opposes the motion of two surfaces sliding past each other.
Air Resistance
Opposes the motion of objects to fall with different accelerations and different speeds. If there was no air Resistance then all objects would fall.
Gravity
An attractive force between any two objects that depends on the masses of the objects and the distance between them.
Weight
The gravitational force exerted on an object. The weight of an object on Earth is equal to the force on Earth’s gravity on the objects.
Centripetal Acceleration
Acceleration toward the center of a curved or circular path.
Centripetal force
The net Force exerted toward the center of a curved path.
Newtons third law of motion
For every action there is an equal or opposite reaction.
Momentum
All objects have mass so if an object is moving, then it has momentum.i The amount of momentum that an object has is dependent upon two variables, how much stuff is moving and how fast the stuff is moving.
