Unit 4

Properties of circular motion:

  • Constant acceleration - velocity is constantly changing (speed is the same but direction is changing)
  • Acceleration is perpendicular to instantaneous velocity
  • Constant Kinetic Energy - speed is constant and direction doesnt have any effect

Process of gravity acting on a body:

1) Gravitational energy stored in a body

2) Work done to move that body to its position in a gravitational field from infinity

3) At infinity there is no force between the masses and zero gravitational energy

4) As the masses get closer the gravitational energy decreases giving a negative value

How a Transformer works:

1) Change in current in primary coil

2) Causes a change in B-field around…

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