FORM 4: 2.2 ANALYSING MOTION GRAPHS

DISPLACEMENT-TIME GRAPH

The gradient of the straight line in the displacement-time graph is the average velocity.

OA:      the gradient is constant indicates that the velocity is uniform

AB:      the gradient is zero indicates that the velocity is zero

BC:      negative gradient indicates that the velocity is negative which means that the direction of motion has reversed

VELOCITY-TIME GRAPH

The gradient of the straight line in the velocity-time graph represents the acceleration.

OA:  the gradient is constant indicates that the acceleration is uniform

AB:  for zero gradient, the acceleration is zero (moving with uniform velocity)

BC:  the gradient is negative indicates that the acceleration is negative (decelerating)

Area under the velocity-time graph represents displacement.