Motion

Front 1

Scalar

Back 1

* without direction ie: length, mass and time.
* A vector and a scalar = a vector
* a scalar and a scalar = a scalar

Front 2

Vectors

Back 2

* with direction such as force, acceleration and displacement.
* Vectors can be added only if ithey are in the same direction.
* to add vectors in different directions their components such xyz but be added to get the vector.

Front 3

Components

Back 3

* portion of a vector in a given direction

Front 4

Speed

Back 4

*scalar : no direction.
*rate of change in distance
* instantaneous speed is speed at an instant
* avg speed: l/t

Front 5

Velocity

Back 5

*vector: has direction
*rate of change in displacement
*instantaneous velocity is the velocity at an instant
* avg velocity: s/t
*direction of instantaneous velocity is tangent to path at the point.

Front 6

Acceleration

Back 6

* rate of the change in velocity over time.
*if acceleration is constant then there is no change in direction.

Front 7

Free falling bodies

Back 7

* acceleration is towards earth
* at constant speed of 9.8m/s^2
*If something is dropped or tossed downward it's easier to make it a positive to get a positive g
*When tossed up, make the initial velocity opposite of g.
*Net acceleration is constant if air resistance is not taken into considertation. If there is air resistance, a will decrease until it reaches terminal velocity.

Front 8

Terminal Velocity

Back 8

* when acceleration reaches zero.
*weight =friction = no force.

Front 9

Projectiles

Back 9

*free falling bodies usually vertically.
* no horizontal calculations
*When object tossed upward comes down to where it started the displacement, s, for the entire trip is 0. Initial velocity and acceleration are opposite in sign.
•When you toss something straight up and it comes down to where it started, there is symmetry. Initial velocity and final velocity are equal and opposite. Time spent going up = time spent coming down