P5 Flashcards
What way does friction work in
always acts in the opposite direction to movement
what is drag
resistance in a fluid
what is newtons 1st law
a force is needed to change motion
if the resultant force on a stationary object is zero it will remain stationary
if the resultant force on a moving object is zero the object will remain at the same speed
what is newtons 2nd law
acceleration is proportional to the resultant force
acceleration is inversely proportional to mass
what is a vector quantity
have a magnitude and a direction
what is a scalar quantity
only have a magnitude
example of scalar
time temperature mass
example of vector
force displacement acceleration
what is a resultant force
overall force on object
what is velocity
speed in a given direction
what is newtons 3rd law
when two objects interact the forces they exert on each other are equal and opposite
what is stopping distance
thinking distance and braking distance
what is inertia
a tendency for motion to remain unchanged
what are the factors affecting braking distance
speed
weather
condition of tyres
what is velocity
speed in a given direction
