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What is the difference between a scalar and a vector
scalars only have a magnitude, but vectors have a magnitude and a direction.
Give 3 examples of a scalar.
speed
distance
mass
Give 3 examples of a vector.
1. acceleration
2. velocity
3. force
What is the equations for velocity?
velocity = displacement/time taken
What is the definition of acceleration?
rate of change of velocity - How quickly something speeds up of slows down.
What is kinetic energy?
The energy stored by an objects movement
What is gravitation potential energy?
The energy stored in objects raised above the earths surface - Exists because of earths gravitational field
What is chemical energy?
The energy stored by the chemical bonds between atoms
What is elastic potential energy?
the potential energy of an object that is stretched or compressed
What is nuclear energy?
Energy stored in the nucleus of an atom - Released by radioactive decay
What is thermal/internal energy?
The total kinetic energy of particles in a substance
Give 3 examples of a contact force
Friction
air resistance
tension
Give 3 examples of non-contact forces
gravitational
magnetic
electrostatic
What is newtons 1st law?
A resultant force is required to change the motion of an object
What will happen to a moving object that has no resultant force?
It will continue to move in the same velocity
What is newtons 2nd law?
If a non-zero resultant force acts on an object, then it will cause the object to accelerate.
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