mechanicka praca Flashcards

1
Q

fyz veličina

A

označenie W
skalárna fyz veličina
Jednotka J
je mierou zmeny energie vieme nou merať energiu

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2
Q

čo znamená že je skalarna

A

ma iba veľkosť

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3
Q

uhol medzi vektorom sily a vektorom posunutia je nula

A

W=F.s

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4
Q

uhol je väčší ako nula menší ako 90

A

W=Fscos

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5
Q

uhol medzi vektorom sily a vektorom posunutia

A

W=Fscos90
W=Fs0
W=0

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6
Q

uhol medzi vektorom sily a vektorom posunutia he vacsi ako 90 a menší alebo sa rovná 180

A

W je záporne

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