chapter 11 Flashcards
Explain why we still use a
Newtonian model even
though it is a less workable
model.
while other models are more workable than Newtonian mechanics they involve mathematics that is much more complex. so we still use Newtonian mechanics to study the motion of the most everyday objects because it explains observaverations and makes predictions accurately.
Identify physical systems to
analyze motion.
Projectile motion, Free Falling, Circular, Linear
Explain the importance of
frame of reference.
it provides a standard point if motion to measure.
displacment equation
(displacment)C=square root of a^2 +b^2
calculate time
Disance divided by speed
Why is a frame of reference
important for describing
motion?
The frame of reference is important for describing motion because it is the coordinate system used to describe the motion of an object.
Compare distance vs.
displacement.
Distance refers to the total length of the path traveled by an object, regardless of direction, while displacement is the straight-line distance between an object’s starting and ending positions
Compare vectors and scalars.
scalar is a quantity that only has magnitude (size), while a vector is a quantity that has both magnitude and direction
Calculate speed, velocity, and
time using mathematical
equations.
Speed- distance divided by time
Velocity- displacement divided by time
Time- distance divided by speed
Explain situations where
momentum is conserved.
where no external force acting force acting upon it other than gravity
Define speed and velocityv
Speed- A scalar quantity indicating the rate of which an object is moving
Velocity- a vector quantity indicating the rate at which an object’s position changes
Are speed and velocity the same
thing? Explain.
No they are not the same thing, speed is a scalar quantity indicating the rate of which an object is moving. Velocity a vector quantity indicating the rate at which an object’s position changes
Define circular motion.
Movement along a circular path
Describe the path of a projectile.
The path is the two dimensional motion of any flying object whose path is determined by the influence of an external force only, such as gravity.
Compare linear, circular, and
projectile motion.
- the rate of change in velocity
Describe the path of a projectile
The path is the two dimensional motion of any flying object whose path is determined by the influence of an external force only, such as gravity.
Define acceleration.
the rate of change in velocity
momentum equation
p=m/v
p is momentum
Give an example of a positive acceleration and a negative acceleration.
Positive example is a car speeding up, Negative example is a car slowing down.
What is free fall?
any motion of a body where gravity is the only force acting upon it
What do we call the curved path of a projectile?
Trajectory
How do we describe motion when velocity changes?
acceleration
