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When the acceleration is not in a straight line on a graph what does this indicate?
That the force that causes the acceleration is not constant.
How is a speed graph different from an acceleration graph?
A speed graph measures the distance devided over time. Acceleration graph measures the change in speed over time.
How would a graph of negative and positive acceleration differ?
This depends on what the graph represents. If it is a graph of velocity on the vertical and time on the horizontal, then if acceleration is at a constant rate, the graph will be a straight line with positive slope (pointing 'up'). If acceleration stops, then the graph will be a horizontal line (zero acceleration or deceleration). If it is deceleration (negative acceleration), then the graph will have negative slope (pointing down).
What is the difference between a curved line on a distance-time graph and a straight line?
A curved line represents changing speed - either acceleration or deceleration - while a straight line indicates that the speed is constant.
What is the nature of distance time graph for the motion of an object moving with a changing speed?
An incline represents acceleration, a straight line represents a constant speed and a decline represents slowing down.
