What is Motion
Motion
A change in position relative to a frame of reference is what?
Frame of reference
All movement is compared with what?
Speeding up, slowing down or changing direction.
An object that is accelerating is doing the following three things?
Direction
An object traveling in circular motion is constantly changing what?
Acceleration
Circular motion always involves __________?
MOMENTUM
Equal to the mass of an object multiplied by it's velocity.
Dividing the distance traveled by the time taken to travel that distance
How is speed determined?
29 km/hr
If a motorboat travels 25 Km/Hr down a river whose velocity is 4 km/hr, what is the boat's actual velocity?
Motion
Involves a change in position during a certain amount of time.
Velocity
Momentum is mass times what?
MOMENTUM FORMULA
Momentum=M x V
EARTH
Most common frame of reference
FORMULA FOR SPEED
S=D/T
VELOCITY
Speed in a given direction
CONSTANT SPEED
Speed that does not change
AVERAGE SPEED
The average of different speeds usually found by the formula for speed S=D/T
FRAME OF REFERENCE
The background or object that is used for comparison.
Position and Time
The characteristics of ____________ and _____________ are used to measure motion.
CIRCULAR MOTION
The curved path of motion
Speed
The rate at which an object changes position is called what?
SPEED
The rate at which an object moves
ACCELERATION
The rate of change in velocity
Acceleration
The rate of change of velocity is called what?
the same outside
The total momentum of any group of objects remains ________________ unless _____________ forces act on the objects.
CONSERVATION OF MOMENTUM
The total momentum of any group of objects remains the same unless outside forces act on it
FALSE it's motion
True of False? A change in position of an object is called momentum.
True
True of false? Motion must be measured relative to a frame of reference?
TRUE
True or False? The measurement of how fast or slow something is traveling is speed.
FALSE it's velocity
True or False? The quantity that gives speed and direction is momentum.
TRUE
True or False? Velocities in opposition directions combine by subtraction.
TRUE????
True or false? Acceleration is a change in speed or direction.
TRUE
True or false? An object whose speed does not change is traveling at constant speed.
FALSE- it is momentum
True or false? The measurement of how hard it is to stop an object (mass times velocity) is acceleration.
True
True or false? An object that is stationary in one frame of reference may be moving in another frame of reference.
False- it is very dificulty to stop
True or false? An object with a large momentum is very easy to stop.
False- it involves acceleration
True or false? Circular motion always invovles deceleration.
False
True or false? For an object moving at constant speed, the speed at any point is not the same as the average speed.
FALSE- momentum is always conserved
True or false? Momentum is never conserved.
True
True or false? The total momentum of any group of objects remains the same unless outside forces act on the objects.
True
True or false? There is no frame of reference that is truly not moving relative to all other frames of reference.
Direction
Velocity is speed and what?
Subtraction
What do you do to combine velocities that have opposite directions?
Addition
What do you do to comibne velocities that have the same direction?
Negative Acceleration
What does deceleration mean?
A background that is assumed to be stationary.
What is all movement compared to?
Because the object's direction is constantly changing.
Why does circular motion always involve acceleration?
COMBINING VELOCITIES
You must use subtraction when combining velocities in the opposite direction and add when the velocites are in the same direction
FORMULA FOR ACCELERATION
final velocity-original velocity/time change in velocity divided by the time it takes to make the change
