All Flashcards
What is the effect of increasing the force applied to an object, assuming constant velocity?
Increased instantaneous power.
What happens if the angle between force and velocity is 90 degrees?
Instantaneous power is zero because .
What is the effect of increasing the time interval over which work is done, assuming constant work?
Decreased average power.
What happens when energy is transferred more quickly?
The power increases.
What happens when work is done in a shorter amount of time?
The power increases.
How do you calculate power using work and time?
Use the formula: , where P is power, dW is the change in work, and dt is the change in time.
How do you calculate power using force and velocity?
Use the formula: , where P is power, F is the force vector, and v is the velocity vector. Remember to use the dot product.
What is the definition of Power?
The rate at which energy is transferred or transformed.
What is the definition of Average Power?
The average rate at which energy is transferred or converted over a time interval.
What is the definition of Instantaneous Power?
The power at a specific moment in time.
Define Work in Physics.
Energy transferred by a force acting over a distance.
What is a Watt?
The SI unit of power, equivalent to one joule per second (1 W = 1 J/s).