Section 4- Forces And Energy Flashcards
1
Q
Equation for work done
A
Work(J) = force(N) x distance moved (m)
2
Q
Equation for power
A
Power(W)= energy transferred(J) / time taken (s)
Or
Power= work done/ time taken
3
Q
Fields
A
A region of space where an object experiences a force
4
Q
Electric fields
A
Static electricity is caused when two insulators are rubbed together
5
Q
Force
A
-
6
Q
Free body force
A
A diagram that uses vector arrows to represent all the forces on a body
7
Q
Resultant force
A
All combined effects of all forces
8
Q
How do you use scale drawings to find resultant force?
A
-
9
Q
Equation for moment of a force
A
Moment
—————————
Force x distance
10
Q
Moment
A
-
11
Q
Examples of contact forces
A
- tension
- friction
- air resistance
12
Q
Examples of non-contact forces
A
- gravitational
- electrostatic
- magnetic
13
Q
Force field
A
A region of space where an object experiences a force
