Hello forum.
I am finding it hard to wrap my mind around the concept of power when considering forces. We can derive [itex]\text{P} = \text{F} \cdot t[/itex] but what now does the symbol F really signify?
Is it (1) the net force on an object or (2) can we simply put in any force for F acting on an object? If the net force were to be zero in case (1), then P would be zero but that does not make any sense since driving a car with constant velocity surely requires provision of energy (right?).
In (2), what can we say about a frictional force acting on the object? Does it have som power which can attributed to it?
I would really appreciate if you could help me fathom the relationship between power and forces!
I am finding it hard to wrap my mind around the concept of power when considering forces. We can derive [itex]\text{P} = \text{F} \cdot t[/itex] but what now does the symbol F really signify?
Is it (1) the net force on an object or (2) can we simply put in any force for F acting on an object? If the net force were to be zero in case (1), then P would be zero but that does not make any sense since driving a car with constant velocity surely requires provision of energy (right?).
In (2), what can we say about a frictional force acting on the object? Does it have som power which can attributed to it?
I would really appreciate if you could help me fathom the relationship between power and forces!
via Physics Forums RSS Feed http://www.physicsforums.com/showthread.php?t=703622&goto=newpost
0 commentaires:
Enregistrer un commentaire