I chapter 1.1 . the oscillatory motion. gravity pendulum. Flashcards
(19 cards)
what’s a oscillatory motion?
the movement of a body that repeats exactly or approximately at equal time intervals and that occurs symmetrically to its equillibrium position.
what type of mechanical movements can a body do?
- even movement
- uneven movement
- straight movement
- curviliniar movement
- circular movement
what’s a periodic motion? give examples.
it’s a movement that repeats at equal time intervals. such as the earth around the sun, the moon around the earth or a clock’s hands.
what is a gravity pendulum? how else is it called?
it is a oscillating system made out of a massles rod, a massive bob, a frictionless pivot which is perpendicular on a surface. it can be called a mathematic one too.
what is a elastic pendulum?
it is a oscillating system that consists a piece of mass which is conected to a spring.
what is the amplitude?
it is the deviation of the oscillating body from its equilibrium position
when is it considered a complete oscilation?
the pendulum is considered to have completed a full swing (oscillation) when the ball or an ordinary body has returned to its initial position.
what is the period of the oscillations?
it is the time interval during which a complete oscillation was performed.
how is it written and in what units of measure is the amplitude charactarized?
it is written as ,,A’’ and is measured in lenght units (cm, m).
how is it written and in what units of measure is the period of the oscillations charactarized?
it is written as ,,T’’ and is measured in time units (sec, h, min).
what is an oscillator?
it is the body that oscillates.
what are mechanical oscillations?
they are the same as oscillatory movements.
how does a pendulum look like?
it’s like a reversed T.
how to calculate the period?
it is calculated through measuring the time intervals, during which more oscillations were performed. T= time intervals/nr. of the oscillations. T=t/n
give me an example of a calculated period of the oscillation?
for ex: P=6-t/6-n P=1 , 1 is the time interval during which a complete oscillation was performed.
what is the frequency of the oscillations?
the physical quantity equal to the number of the oscillations performed in a unit of time.
how is it written and in what units of measure is thefrequency of the oscillations charactarized?
it is written as ,,V’’ and is measured in Hz
who was heinrich hertz?
he began his research in 1880 to investigate the electrical oscillations. in 1887 he published the work on ,,the very fast electrical oscillations’’ in which he describes their method of generation.
what is a Hz?
1 hertz is the frequency of a body’s oscillation which performes one complete oscillation in one sec.
