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

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


Play button


Play button




Click to flip

43 Cards in this Set

  • Front
  • Back
What is motion?
Motion is when a distance from another object changes
How can an object be in motion and not in motion at the same time? Give example
Point of view/ reference point
EX: flying on an airplane
What is the difference between speed and velocity?
speed is how fast an object is going and velocity is speed in a given direction
what is the formula for calculating speed/velocity
What is acceleration?
acceleration is a rate in which velocity changes
How could an object accelerate without changing speed?
change in direction
What are the three ways an object can accelerate?
increase in velocity, decrease in velocity and change in direction
What does the slope of a distance v time graph indicate about an objects motoin?
it indicates velocity
How do you determine if an object is giong faster or slower than another object?
by if the slope is steep or flat
What does the slope of a velocity v time graph indicate about an object's motion?
slope indicates acceleration
velocity v time graph: wat does it mean if the slope is upward? downward? flat?
upward: increasing velocity---downward: slowing down---flat: constant velocity
How could you tell if an object came to a complete stop?
the line would be going downward
how fast will an object be going if it accelerates at a rate of 5/m/s/s for 8 seoconds?
explain how Aristotle and Galileo would explain a pool ball slowly rolling to a stop?
They say that it comes to its natural state of rest and that once an object is in motion, no force is needed to stay in motion
What is Newton's first law of motion?
an object at rest stays at rest and an object in motion stays in motion until acted on by an unbalanced force.
what is force?
any push or pull that causes an object to accelerate
what are the units used to measure force?
newtons or Kg*m/s2
what is balanced force?
equal forces acting on an object in opposite directions: causes no change in motion
what is the net force of a balanced force?
under what two condidtions can an object be experiencing a balanced force?
static/mechanical equilibrium--at rest or at constant speed
what is an unbalanced force?
an unequal force that changes an object's motion
what is the net force of an unbalanced object?
the combination of all forces acting on an object
what does an unbalanced force cause an object to do?
change in motion
why is it harder to get an object in motion then it is to keep it in motion?
difference between balanced and unbalanced. Unbalanced takes more force then balanced
What is Newton's Second Law of motion?
force=mass x acceleration
What is the relationship between force and acceleration?
the relationship is that force causes acceleration
what is the relationship between mass and acceleration
the more mass there is in an object, the more its going to accelerate
what is newton's third law of motion?
for ever action there is an equal but opposite reaction
what is friction?
the force that one object exerts on another object when the two rub against each other
what does friction cause?
objects to slow down, resist motion, produces heat
what two factors affect the frictional force between two objects?
surface texture and pressure between surfaces
what are the three types of friction--list from least to greatest
rolling, fluid, and sliding friction
what is gravity?
a force that pulls objects towards the earth
what is the rate of acceleration due to gravity?
9.81m/s/s2 or 10
If gravity pulls all objects at the same rate, what causes objects to fall at different rates?
air resistance
what is terminal velocity?
the maximum belocity a falling object can achieve
what causes terminal velocity? wat force is it?
when force of air resistance=force of gravity object stops accelerating

balanced force
what is the difference between mass and weight?
mass is the quantity in an object and weight is the gravitational force exerted on an object
if you went to the moon what would happen to your mass? your weight?
why do three objects that are shot horizontally at different rates all hit the ground at the same time?
--gravity is independent of horizontal velocity

--if you shoot hte ball fasste enough it wil never fall back to earth
--object stays in orbit
descrive how the balance of gravity and inertia help keep a satellite inorbit around the earth?
it helps keep it in orbit because inertia goes horizontally and gravity goes down. there is a curved line in the middle that keeps the earth orbitting. if you threw an object fast enough it would circle the earth.
what would happen if the satellite lost velocity? if there was no gravity?
lost velocity--it would go horizontally
no gravity--fall straight down
what two factors affect the amount of gravitational force between two objects? how?
mass and distance

more mass leads to more gravitational pull and the closer together more gravitational pull