Work (Textbook) Flashcards
(10 cards)
When is work positive?
When the force has a component in the direction of displacement.
What type of quantity is work?
Scalar, therefore all the work done adds together.
When is work negative?
When the force has a component in the opposite direction of displacement.
When is there no work?
When the force is perpendicular to the displacement.
For an accelerating block, the block speeds up if…
Work total > 0
A block slows done in relation to work if…
The work total < 0
The block remains without work done on it if…
Displacement doesn’t change and the total work = 0
Kinetic Energy has what kind of quantity?
Scalar!
Can KE ever be negative?
No, but it can be zero when a particle is at rest.
Work-Energy Theorem can tell us about…?
Speed, not velocity - because it is a scalar!
