Normal Force decreases = Weight minus the Y- component of the force.

Back

Force pushing down on an object

Front

Normal Force increases = Weight plus
Y- component of the force.

Back

Flat Slope on a Velocity-Time Graph

Front

NO acceleration (Constant v)

Back

Newton's 3rd Law

Front

For every action there is an equal and opposite reaction; forces always occur in pairs.

Back

Torque

Front

A turning or twisting force; the moment of a force; the measure of a force's tendency to produce twisting or turning and rotation around an axis.

Back

Projectile motion

Front

Motion that moves in the X and Y plane under the influence of gravity.

Back

Relative Motion

Front

Motion relative to a frame of reference (Example looking at a boat's motion and taking the flow of water into account)

Back

Slope on a Position-Time or Displacement-Time graph

Front

Average Velocity

Back

Acceleration of a Projectile

Front

Gravity, 9.8 m/s/s, for the entire trajectory.

Back

Horizontal Vector Component

Front

The part of the vector in the X plane; Vector times the cosine of the angle.

Back

Area on a Velocity-Time Graph

Front

Displacement (Distance when you ignore the negative signs)

Back

Average Velocity

Front

Total Displacement over total time. It is always ZERO on a round trip.

Back

Vector

Front

A quantity with magnitude (Numerical size) and direction; Can be positive or negative.

Back

Newton's 2nd Law

Front

Acceleration is directly proportional to net force and inversely proportional to mass.

Back

Horizontal Component of Velocity

Front

Constant during the entire trajectory.

Back

Force

Front

A push or pull on a body. Measured in Newton's.

Back

Tangential Velocity

Front

If an object is traveling in a circle it is constantly changing direction. The velocity of an object travelling in a circle is always at right angles to the centripetal force. If the centripetal force was removed this would be the direction in which the object would move; Measured in m/s.

Back

Inertia

Front

The tendency of an object to resist a change in its motion.

Back

Vertical Component of Velocity

Front

Changes due to gravity. Decreases on the way up, Zero at the maximum height, and increases on the way down.

Back

Angular Velocity

Front

The object's rotational speed, measured in radians per second (rad/s).

Back

Initial Vertical Velocity

Front

Zero on an object that is launched horizontally.

Back

Finding the Vector angle

Front

Tangent of the angle = Vertical component over the Horizontal component.

Back

Weight

Front

The pull of gravity on a mass; measured in Newton's.

Back

Momentum

Front

A measure of how hard it is to stop an object. Only moving objects have momentum.
A quantity defined as the product of the mass and velocity of an object.

Back

Impulse

Front

Something that changes the momentum of an object. As a measurement, it equals the objects mass multiplied by its velocity, or Force times the time interval in which it acts.

Back

Momentum-Impulse Theorem

Front

Impulse is equal to change in momentum. for a given change in momentum, a larger time interval will have a smaller force. reasoning behind airbags and crumple zones in cars.

Back

Mass

Front

The amount of matter in a body; measured in kilograms.

Back

Elastic Collision

Front

A collision in which the total momentum and the total kinetic energy are conserved.

Back

Flat Slope on a Position-Time Graph

Front

NO Motion

Back

Area on an Acceleration-Time Graph

Front

Average Velocity

Back

Equilibrant

Front

A force that puts a system in Equilibrium or balance; equal to the Resultant but in the opposite direction.

Back

Scalar

Front

A quantity with magnitude (Numerical size) only; Cannot be negative.

Back

Speed

Front

Scalar quantity; How fast an object travels. Distance over time.

Back

Centripetal Acceleration

Front

Acceleration toward the center of a curved or circular path.

Back

Net Force = ZERO

Front

When an object isn't accelerating (Constant velocity) or is at rest.

Back

Velocity

Front

Vector quantity; How fast and in what direction an object travels. Displacement over time.

Back

Perpendicular Force

Front

The component of an object's weight that acts into a ramp or inclined plane; Equal to weight times the cosine of the angle. It opposes the normal force when an object is on a ramp.

Back

Newton's 1st Law

Front

An object at rest, stays at rest; An object in motion, stays in motion, unless an unbalanced force acts on it.

Back

Centripetal Force

Front

A force that is directed toward the center of a curved or circular path.

Back

Acceleration

Front

Change in velocity over a time interval.

Back

Normal Force

Front

The force of a surface pushing back against an object. It equals weight when an object is on a flat surface and there is no force pulling up or pushing down.

Back

Slope on a Velocity-Time Graph

Front

Average Acceleration

Back

Resultant

Front

A vector sum, including direction.

Back

Distance

Front

Scalar quantity; How far you travel. It can be the same as displacement when direction hasn't changed

Back

Vertical Vector Component

Front

The part of the vector in the Y plane; Vector times the sine of the angle.

Back

Free-Fall

Front

An object moving solely under the influence of gravity.

Back

Parallel Force

Front

The component of an object's weight that acts down a ramp or inclined plane; Equal to weight times the sine of the angle.

Back

Trajectory

Front

The path travelled by a projectile.

Back

Displacement

Front

Vector quantity; where you end up versus where you started regardless of path taken.

Back

Rotational Equilibrium

Front

Exists only when the vector sum of all the torques acting on an object is zero.

Back

Section 2

(15 cards)

Mechanical Energy

Front

The total amount of potential and kinetic energy in a system

Back

Inelastic Collision

Front

Maximum loss of KE, objects stick together & momentum is still conserved.

Back

Potential Energy

Front

Energy stored due to an object's position or arrangement.

Back

Maximum Vector Sum

Front

Occurs when vectors are in the same direction. The angle between them is 0 degrees.

Back

Newton's Law of Universal Gravitation

Front

Every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Back

Power

Front

A quantity that measures the rate at which work is done or energy is transformed.

Back

Kinetic Energy

Front

The energy an object has due to its motion.

Back

Law of Conservation of Momentum

Front

The rule stating that the total amount of momentum in a closed system is always the same.

Back

How do airbags work?

Front

The airbag increases the time interval over which the force acts, thereby decreasing the amount of force.

Back

Law of Conservation of Energy

Front

The law that states that energy cannot be created or destroyed but can be changed from one form to another.

Back

Work

Front

"Use of force to move an object; calculated as force multiplied by distance." Measured in Joules.

Back

Perfectly Elastic Collision

Front

Perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision (they bounce off each other).

Back

Minimum Vector Sum

Front

Occurs when vectors are in opposite directions. The angle between them is 180 degrees.

Back

Work - Energy Theorem

Front

Work done on a system is equal to the change in the systems energy.

Back

Conditions for Work

Front

Force must be in the direction of motion and the object must move.