Section 1
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Force pulling up on an object
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Last updated
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Date created
Mar 1, 2020
Cards (65)
Section 1
(50 cards)
Force pulling up on an object
Normal Force decreases = Weight minus the Y- component of the force.
Force pushing down on an object
Normal Force increases = Weight plus Y- component of the force.
Flat Slope on a Velocity-Time Graph
NO acceleration (Constant v)
Newton's 3rd Law
For every action there is an equal and opposite reaction; forces always occur in pairs.
Torque
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.
Projectile motion
Motion that moves in the X and Y plane under the influence of gravity.
Relative Motion
Motion relative to a frame of reference (Example looking at a boat's motion and taking the flow of water into account)
Slope on a Position-Time or Displacement-Time graph
Average Velocity
Acceleration of a Projectile
Gravity, 9.8 m/s/s, for the entire trajectory.
Horizontal Vector Component
The part of the vector in the X plane; Vector times the cosine of the angle.
Area on a Velocity-Time Graph
Displacement (Distance when you ignore the negative signs)
Average Velocity
Total Displacement over total time. It is always ZERO on a round trip.
Vector
A quantity with magnitude (Numerical size) and direction; Can be positive or negative.
Newton's 2nd Law
Acceleration is directly proportional to net force and inversely proportional to mass.
Horizontal Component of Velocity
Constant during the entire trajectory.
Force
A push or pull on a body. Measured in Newton's.
Tangential Velocity
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.
Inertia
The tendency of an object to resist a change in its motion.
Vertical Component of Velocity
Changes due to gravity. Decreases on the way up, Zero at the maximum height, and increases on the way down.
Angular Velocity
The object's rotational speed, measured in radians per second (rad/s).
Initial Vertical Velocity
Zero on an object that is launched horizontally.
Finding the Vector angle
Tangent of the angle = Vertical component over the Horizontal component.
Weight
The pull of gravity on a mass; measured in Newton's.
Momentum
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.
Impulse
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.
Momentum-Impulse Theorem
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.
Mass
The amount of matter in a body; measured in kilograms.
Elastic Collision
A collision in which the total momentum and the total kinetic energy are conserved.
Flat Slope on a Position-Time Graph
NO Motion
Area on an Acceleration-Time Graph
Average Velocity
Equilibrant
A force that puts a system in Equilibrium or balance; equal to the Resultant but in the opposite direction.
Scalar
A quantity with magnitude (Numerical size) only; Cannot be negative.
Speed
Scalar quantity; How fast an object travels. Distance over time.
Centripetal Acceleration
Acceleration toward the center of a curved or circular path.
Net Force = ZERO
When an object isn't accelerating (Constant velocity) or is at rest.
Velocity
Vector quantity; How fast and in what direction an object travels. Displacement over time.
Perpendicular Force
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.
Newton's 1st Law
An object at rest, stays at rest; An object in motion, stays in motion, unless an unbalanced force acts on it.
Centripetal Force
A force that is directed toward the center of a curved or circular path.
Acceleration
Change in velocity over a time interval.
Normal Force
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.
Slope on a Velocity-Time Graph
Average Acceleration
Resultant
A vector sum, including direction.
Distance
Scalar quantity; How far you travel. It can be the same as displacement when direction hasn't changed
Vertical Vector Component
The part of the vector in the Y plane; Vector times the sine of the angle.
Free-Fall
An object moving solely under the influence of gravity.
Parallel Force
The component of an object's weight that acts down a ramp or inclined plane; Equal to weight times the sine of the angle.
Trajectory
The path travelled by a projectile.
Displacement
Vector quantity; where you end up versus where you started regardless of path taken.
Rotational Equilibrium
Exists only when the vector sum of all the torques acting on an object is zero.
Section 2
(15 cards)