Chapter 7 Flashcards
0
Q
SI unit of Work
A
Joules
1
Q
Work
A
Force times displacement times cosine theta
2
Q
If work is positive
A
Energy is transferred to the system
3
Q
If work is negative
A
Energy is transferred from the system
4
Q
Work done by a spring.
A
Fs=-KX
5
Q
Kinetic energy
A
1/2mv^2
6
Q
Wext
A
Change in kinetic energy
7
Q
Work kinetic energy theorem
A
When work is done on a system and the only change in the system is in its speed the net work done on the system equals the change in kinetic energy of the system as expressed by the equation
Wext=change in kinetic energy
