Work done Flashcards
1
Q
When is work done?
A
- Work is done when an object is moved over a distance by a force that is applied in the direction of its displacement
- If force is applied but the object doesn’t move then no work was done
2
Q
Equation for work done
A
- Work done (Nm) = force (N) X distance (m)
3
Q
How is energy transferred and work done related?
A
- When any work is done, energy is transferred from one store to another
- Energy transferred (J) = work done (Nm)
- 1J = 1Nm
4
Q
How does friction effect work done?
A
- Friction works in opposition to the motion of the object
- When friction is present, energy is lost to the surrounding via heat
- Air resistance is a type of friction