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Physics Review Chpt. 9
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Gravity
Terms in this set (39)
k
spring constant
T
period
A
amplitude
f
frequency
(-)(max)
maximum displacement of a pendelum
projectile
anything hurled through the air or through space
trajectory
path of a projectile
parabola
curved line
vertex
highest point
turbulence
uneven flow
eddy currents
drain kinetic energy from the projectile and increase air resistance
streamlining
method of reducing turbulence by fitting the object to the natural flow of air
uniform circular motion
a circular path followed at a constant speed
centripetal
acceleration toward the center of a circle
centripetal
produces centripetal acceleration
law of centripetal force
F = mv(2)/r
inertial frame of reference
unaccelerated frame of reference
noninertial frame of reference
constant centripetal acceleration frame of reference
displacement
x
spring constant
k
equilibrium
when two forces going in opposite directions are equal in magnitude
oscillatory motion
an object that has this moves repeatedly back and forth over the same path an completes every round trip at the same rate
period
time it takes for one full oscillation
amplitude
the absolute value of maximum displacement in either direction
frequency
the number of oscillations that occur per unit of time
hertz
one cycle per second (SI unit of frequency)
simple harmonic motion
Consists of oscillations along a straight line and is produced by a restorative force that is proportional to the displacement
periodic motion
any motion that occurs repeatedly after the same lapse of time
simple pendulum
a freely swinging mass hanging by a thin connector that is assumed to be massless
physical pendulum
any rigid body mounted so that it can swing in a plane about a point of support
natural frequency of vibration
natural oscillating frequencies
subjectivism
a view in philosophy which says that a law is merely a pattern that man invents and imposes on the world for his own convenience
idealism
philosophy that says that a law has an independant existence of its own
forced oscillation
oscillation of an object under the influence of an external force
driving frequency
frequency that acts upon an object
resonance
situation in which two frequencies are the same or nearly the same
basketball, baseball, frisbee
Give three examples of projectiles.
not affected
How is the rate of downward acceleration in a vacuum affected by horizontal motion?
they hit the ground at the same time
If a brick is dropped, a baseball is hurled horizontally, and a bullet is fired horizontally all at the same height, which object hits ground first?
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