cinematica Flashcards

1
Q

De ce este caracterizata miscarewa mecanica?

A

traiectorie, deplasare(S) ,drum parcurs

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2
Q

Tipuri de mscari?

A

In dependenta de traiectoeie miscarea poate fi curbilinie sau rectilinie

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3
Q

Miscarea rectilinie uniforma?

A

Miscarea se numeste uniforma daca mobilul in intervale de timp egale parcurge distante egale

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4
Q

viteza

A

marimea fizica vectoriala ce determina cantitativ rapiditatea modificarii coordonatei corpului

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5
Q

x=x_0+v_x*t(forma scalara)

A

ecuatia miscarii ce permite determinarea pozitiei corpului in spatiu in orice moment de timp

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6
Q

deplasareaa in miscarea rectiline uniforma

A

este egala cu aria figurii de graficul dependentei vitezei de timp Δt*v=S

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7
Q

graficul miscarii RU?

A

graficul dependentei coordonatei de timp pentru miscarea U reprezinta o dreapta ce formeaza un unghi cu axa timpului <90°,v>0

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8
Q

Miscarea rectilinie uniform variata

A

miscarea in care in intervale de timp egale viteza variaza la felk

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9
Q

acceleratia

A

rapiditatea variatiei vitezei a_x=(v_x-v_0x)/t

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10
Q

Ecuaatia vitezei pentru miscareaRUV

A

v_x=v_0x+a_x* t

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11
Q

graficul miscarii uniforme variate?

A

graficul dependentei coordonatei de timp pentru miscarea U reprezinta o dreapta ce formeaza un unghi cu axa timpului <90°,a>0

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12
Q

Ecuatia deplasarii in MRUV?

A

S=v_0xt+(a_xt)/2

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13
Q

Ecuatia MRUV?

A

x=x_0+v_0xt+(a_xt)/2

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14
Q

Expresia lui galilei pentru deplasare

A

S={v-v_0}/(2a_x )

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15
Q

caderea libera

A

miscarea corpului sub actiunea fortelor de greutate in lipsa fortelor de rezistenta

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