Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/32

Click to flip

32 Cards in this Set

  • Front
  • Back
Vector
Quantity that has both number (magnitude) and direction (velocity)
Scalar
Just a number (speed)
Adding Vectors
Head-to-Tail
Subtracting Vectors
-It is not communitive
- Put the head pointing the opposite direction
Multiplying a vector by a scalar
Make that vector however many times longer depending on the number said(scalar)
Components of a Vector
- Vertical Component
- Horizontal Component
Pythagorean Thm
a2 + b2 = c2
c2 = hypoteneuse
Ball Launch Experiment
- How far forward did it go?
- How high was the cliff?
- How fast was the car going when it hit the ground?
Vertical and Horizontal Motion
They are independent
Projectile Motion
Freefall in 2 or 3 D
Horizontal Speed- no change
Vertical Speed- affected by gravity
Maximum Range
-Any two angles that add up to 90* will hit the same spot
Earth Orbit
8 km/s
Galileo: Inertia
- Resistance to change in motion
- The property of objects to keep doing whatever they are doing
Newton's 1st Law
- Objects in motion remain in motion at a constant velocity
- objects in rest remain at rest
- Unless acted upon by a net total outside force that it not from that objects itself
Mass
- Physical amount of material in that object
- "mass is the measure of inertia"
- more mass-- more inertia
Weight
- Force of gravity acting on an object
- w=mg
Newton
N
kgm/s2 = N
Equilibrium
When the net force is 0
Force Diagrams
- Draw only one object
- Draw forces on that object as vectors
- Only draw forces that act ON the object
Net force
- Sum of all of the forces on an object
- Fnet= 0 - no change in motion
-rest, constant velocity
Newton's 2nd Law
- More mass-- more resistance to change in motion (more inertia)
- apply more net force- more change in motion
a= f/m
Newton's 2nd Law for gravity
-Constant force produces constant acc
Fgrav=magrav
w=mg
Freefall
agrav=Fgrav/m
=w/m
=mg/m
=g
- All objects fall at the same rate
Pressure
Force Concentration
P=F/A
More area- less pressure
(Pa)
Pascals
Measurement for Pressure
Friction
- Force that opposes motion
- caused by intermolecular snagging
Pressure and Friction
Pressure, Surface Area
Book on side vs. Book on spine: Same total friciton
Wide tires: No change in traction (friction)
Air Resistance
- Friction with air
- Depends on speed, surface area
Fnet 0, Acc 0
Terminal Velocity
- Reaches its final speed, and continues going at the same rate
- Reaches equilibrium
- Morse massive- faster terminal velocity and also hits the ground first
- Single- Reaches terminal velocity first
Satellites
Projectiles in Orbit
close to earth- 8 km/s
Earth's Curvature
8 km forward
5 m downward
Inertia
-Resistance to change in motion
- depends on mass- measure of inertia