Level 80
Level 82

#### 46 words 0 ignored

Ready to learn
Ready to review

## Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

**Ignore?**

inertia

_______ is the property of an object that leads it to resist any change in motion

Newton's 1st law of motion

An object continues in a state of rest, of uniform motion in a straight line, unless acted upon by an unbalance force

Newton's 2nd Law of motion

a resultant force acting on a body equals the rate of change of momentum of the body

Newton's 3rd law of motion

For every action (force), there is an equal and opposite reaction (force)

momentum

(p) vector quantity describing the quantity of motion or inertia in motion. Recognizes that both mass and velocity have a part in the motion of an object and is proportional to both (is zero …

impulse

a large change in momentum over a short period of time

elastic collision

Kinetic energy is conserved and in a collision the two objects would not lock together but go in opposite directions

inelastic collision

A collision in which the colliding objects become distorted, generate heat, and possibly stick together.

Law of Conservation of Momentum

If no external forces act on a system, then the total momentum of that system remains the same

vector

a displacement distinguished by magnitude and direction but not by location.

scalar

a physical quantity that has magnitude but no direction

Examples of elastic collision

Stop and go, in and out, and one in two out

Collide and stick

Example of inelastic collision

Isolated System

A system that has are no energy transfers between that system and its surroundings.

kinematics

branch of mechanics that explains the "what" and "how" of motion

Dynamics

A branch of physics that focuses on force and how they relate to motion.

Position

Is the distance and direction away from a reference point

displacement

A change in position (delta p).

Velocity

a speed in a particular direction.

uniform motion

constant velocity with no change in direction

Non uniform motion

Is when the velocity of an object is not constant

Instantaneous Velocity

How fast an object is moving and direction of motion at each instant in time

acceleration

(physics) a rate of change of velocity

work

a force acting upon an object to cause a displacement. (key words: force, displacement, and cause)

Closed System

A system containing a fixed amount of matter; it can still exchange energy with the surroundings.

Centripetal Force

A force directed towards the center of a circle that causes an object to follow a circular path

Tangental velocity

Is the velocity tangent to its circular path

Monochromatic

light source with single wavelength

Given Action and Reaction Forces, Determine if There is a Net Force Resulting in Acceleration

two objects may exert the same force on each other but one may accelerate because it has a smaller mass

p = mv

Calculate the Momentum of an Object When Given Mass and Velocity

m = p/v

Calculate the Mass of an Object Given Momentum and Velocity

v = p/m

Calculate the Velocity of an Object Given Mass and Momentum

momentum is doubled/tripled/quadrupled for both scenarios

If Mass is Doubled/Tripled/Quadrupled and Speed Stays the Same, What Happens to Momentum?

Impact Force

the force acting on an object usually when it hits something

Impact Forces

average force of impulse

i = ft

Calculate Impulse When Given Force and Time

t = i/f

Calculate Time When Given Force and Impulse

f = i/t

Calculate Force When Given Impulse and Time

use p =M(vf-vi) and then use i=ft

Calculate the Momentum of an Object After X Seconds Free Fall

use vf= vi + at

Calculate the Final Velocity Given Mass, Force, and Time

More Time = Less Force

Explain How Impact Force Changes If You Increase of Decrease Time

more time to stop = less force

Explain How Stopping Force Changes As Time Changes

use vf = vi +at or T = square root of 2d/a

Be Able to Calculate Force or Time If Given Data to Calculate Change in Momentum

impulse: i = ft

Calculate the Impulse and Impact Force of Car Hitting a Wall and Stopping Versus Hitting a Haystack and Stopping

•longer barrel in a cannon = more velocity because it travels for a longer period of time

When a Gun or Cannonball is Fired Be Able to Explain the Forces, Time, Change in Momentum (Impulse), and Velocity

Inelastic Collisions

stick together