Chapter 2 Quiz Flashcards
What is motion?
Motion occurs when an object changes in position
What is a point where you base an object’s position?
reference point
Position depends on _____
reference frame or reference points
What is displacement?
Displacement is the distance and direction of an object’s final position from its initial position.
What is speed?
Speed is the distance an object travels per unit of time
What is the formula for speed
s=d/t
What is the SI standard unit for speed
m/s
What is instantaneous speed?
speed at a single instance of time
What is constant speed?
speed that does not change
What is average speed?
the total distance an object moves over the total period of time
What does a straight diagonal line mean on a distance-time graph?
that the object is traveling at a constant speed
What does a horizontal line mean on a distance-time graph?
that the object is at rest
What is velocity?
Velocity is the speed of an objecct and the object’s direction
The velocity of an object changes as the _____ or _____ of the object changes
speed direction
Velocity is different from speed because…
it includes direction
2 objects can have the same speed but different velocities if…
they are going in different directions
What is the formula for velocity?
v=d/t
What is the standard SI unit for velocity?
m/s direction
Motion is relative - what does this mean?
what are you comparing your motion to
What is momentum?
Momentum is a property of a moving object that depends on the object’s mass and velocity
What is the formula for momentum?
p=mxv
What is the standard SI unit for momentum?
Kg x m/s direction
What is acceleration?
Acceleration is the change of velocity of an object over time
What is the formula for acceleration?
v.f - v.i
a = ———-
t
What is the standard SI unit for acceleration?
m/s^2 direction
What does centripetal imply?
something moving in a curved or circular way
What is centripetal acceleration?
Centripetal acceleration is acceleration toward the center of a curved or circular path
What is a projectile?
A projectile is any object moving through the air
_=d/t
speed formula
v.f - v.i
_ = ———- direction
t
acceleration formula
_=d/t direction
velocity formula
_=mxv direction
momentum
