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PHYS 1P21/91
Introduction
Kinematics
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1P91_Sternin
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Kinematics
Introduction
Kinematics: motion in one and two dimensions
Displacement is a vector
graphical
vector addition:
tail-to-tip
vs.
parallelogram
methods
Ex:
geographical direction
Ex:
an interactive vector calculator
Algebra of vectors
Ex:
sum gives
no displacement at all
subtraction is a form of addition
multiplication by a scalar
Ex:
forces are vectors, too
unit vectors
define
a coordinate system
resolving vectors into
scalar components
Ex:
a diving whale
a mathematical detour
relating vectors and their scalar components
Ex:
displacement of a football player
adding vectors via components
(or
this
)
Ex:
displacement of a basketball player
Time dependence: speed, velocity, and acceleration
average speed and velocity
Ex:
two runners
Ex:
getting to Brock U
graphical representation of motion:
uniform velocity
and
non-uniform velocity
Ex:
uniform circular motion
acceleration
vs.
deceleration
Ex:
displacement of an accelerating boat
Ex:
an accelerating spacecraft
Ex:
car stopping distance is proportional to
V
_{0}
^{2}
Ex:
baseball thrown upwards
Ex:
a diver problem
Antigravity
average vs. instantaneous velocity
Kinematics in 2D
superposition principle:
x
-motion is independent of
y
-motion
Ex:
two balls falling
, or
a coin and a feather
Ex:
dropping a lifeboat
(projectile motion)
Ex:
pitcher's mound
Ex:
a daredevil jumping over buses
maximum range (ballistics)
Dynamics
Work and energy
Rotational motion
Linear and angular momentum
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Updated: 17-Apr-2019 17:07