work, energy, and power Flashcards
1
Q
work
A
the product of the average force acting on an object and the displacement moved in the direction of the force. (work done = force x distance)
2
Q
energy
A
the stored ability to do work (energy = power x time)
3
Q
joule
A
SI unit of energy or work done. one joule of work is done when a force of 1N moves its point of application by 1m in the direction of the force.
4
Q
principle of conservation of energy
A
energy cannot be created nor destroyed, but it can be converted from on form to another.
5
Q
kinetic energy
A
energy of mass due to its motion (1/2kx²)
6
Q
power
A
rate of doing work w.r.t. time or the rate of transfer of energy w.r.t. time
7
Q
watt
A
SI unit for power. 1W is defined as the rate of rancher of energy of 1J per second.
