Flashcards in 1 and 2 Deck (23)
What is scalar
Something that direction doesn’t effect and are based sourly on magnitude.
Examples of scalars
What is a vector
Depends on magnitude and direction.
Examples of vectors
What is acceleration
A change on velocity over time
V = final velocity
U = initial velocity
Units of acceleration
M/s/s or m/s (squared)
Steeper the slope faster the speed.
Horizontal = stopped.
Speed = distance/ time
Steep slope means ACCELERATION.
Horizontal line = steady speed
Distance covers = area under the line on the graph.
Newton’s 2nd law
F = M x A
Newtons 3rd law
For every action there is an equal and opposite reaction
Newtons 1st law
An object in motions stays in motion until a oppersite force in applied to it.
P = M x V
Measured in KG/M/S
Stopping distance = thinking distance + braking distance
What effects thinking distance?
- drugs in body
What effects breaking distance
- road conditions
- brake conditions
- tyre conditions
Kinetic energy formula
Kinetic energy = 0.5 x mass x velocity x velocity
Work done formula
Work done = force x distance moved.
Conservation of mass
When two objects collide the momentum stays the same
In a crash, send in general the force equation is:
Force = change in momentum
Gravitational potential energy formular
GPE = Weight x Height
Weight = mass x gravity