Work Done And Power Flashcards
1
Q
What is work done?
A
When a energy changes from one form to another
2
Q
What is the equation to calculate the work done (with units)?
A
Work done (J) = Force (N) x Distance (m)
3
Q
Work done = ?
A
Energy transferred
4
Q
What does mechanical work involve?
A
A force moving an object
5
Q
What does electrical work involve?
A
Current transferring energy.
6
Q
What is power?
A
The rate of doing work- how much work is being done each second
7
Q
What is the unit for power?
A
Watts (W)
8
Q
What is 1W = ?
A
1W = 1J
9
Q
What is the equation to work out the power (with units)?
A
Power (W) = work done (J) / time taken (s)
10
Q
What does a lever do to the work?
A
Make the work easier as the force applied is less, since the distance is already greater.
