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define acceleration
the rate of change of velocity
what’s the equation for velocity?
velocity = final velocity - initial velocity/time
what does a constant positive gradient show in a velocity time graph?
constant acceleration
what does a straight line with no gradient on a velocity time graph show?
constant velocity of zero acceleration
what does a straight line of constant negative gradient show?
constant deceleration
what does a curve with changing gradient show?
changing acceleration
what does the gradient in a velocity time graph represent?
the velocity
what is the area under the gradient in a velocity time graph?
the displacement
how do you calculate the area under the gradient for a linear velocity time graph?
break the area under into triangles and rectangles to calculate the displacement
how do you calculate the area under the gradient for a non linear velocity time graph?
count the squares that are completely or half under the gradient, disregard the ones that are mostly above the gradient