chapter 2 forces and motion Flashcards
the distance-time graph for any object that is…
horizontal line- stationary
straight line with a slope- moving at constant speed
vector quantity
magnitude and direction
scaler quantity
magnitude only
displacement
distance in a given direction
velocity
speed in a given direction
if a velocity- time graph is a horizontal line
the acceleration is zero, constant speed
the bigger the resultant force
the greater the objects acceleration
the greater the mass of an object
the smaller its acceleration for a given force
stopping distance
depends on thinking and breaking distance
what factors increase breaking distance
high speed, poor weather and poor vehicle maintenance
what factors increase the thinking distance?
poor reaction time and high speed
terminal velocity
velocity it eventually reaches when it is falling in a fluid. The weight of the object is then equal to the frictional force on the object
when an object is moving at terminal velocity
the resultant force is zero, therefore the acceleration is zero
