linear motion Flashcards
define linear motion
movement of a body in a straight or curved line where all parts move the same distance, in the same direction and the same time.
how is linear motion produced
a direct force being applied to the centre of mass of the body
define distance
total length covered from start to finish (m)
define displacement
the shortest straight line rout from start to finish (m)
define speed
the rate of change in distance (m/s)
formulae for calculating speed
speed = distance/ time
define velocity
the rate of change in displacement (m/s)
formulae for calculating velocity
velocity = displacement/ time
define acceleration/ deceleration
the rate of change in velocity (m/s/s)
formulae for calculating acceleration
acceleration = change in velocity/ time
sketch distance time graph at rest
sketch distance time graph for constant speed
sketch distance time graph for acceleration
sketch distance time graph for deceleration
sketch speed time graph for acceleration, deceleration, constant speed and at rest.
sketch a velocity time graph for acceleration, deceleration, constant speed, increasing acceleration, forward direction, backward direction
a = acceleration
b = steady speed
c = deceleration
d = backwards direction
e = increasing acceleration
