8 Flashcards Preview

Physics > 8 > Flashcards

Flashcards in 8 Deck (8)
Loading flashcards...
1
Q

Work done (in words):

A

Energy transfer, to move an object a certain distance.

2
Q

Work done =

A

Force x distance (in direction of the force.)

3
Q

Power (in words):

A

Energy transfused per second.

4
Q

Power =

A

Work done / time.

5
Q

What are the three non contact forces?

A
  • weight
  • magnetism
  • Electrostatic force.
6
Q

Weight or Gravity:

A
  • non contact force
  • mass attracts mass
  • gravitational field
  • proven by the tide.
7
Q

Electrostatic force:

A
  • non contact force
  • where protons attracts electrons force
  • the more charge the more force.
8
Q

Magnetism:

A
  • non contact force.
  • opposites attract
  • some poles repel.