MadSci Network: Physics

Re: the acceleration mystery

Date: Thu Apr 16 05:29:26 1998
Posted By: Jocelyn Wishart, Lecturer, Education, Loughborough University
Area of science: Physics
ID: 891956882.Ph

You are absolutely right. Acceleration is defined as the change in velocity of an object in a unit of time. Its standard unit is metres per second per second. Deceleration (slowing down) is acceleration in the opposite direction to the object's motion.

Acceleration of a moving object is given by the gradient of its velocity-time graph; the steeper the slope the greater the change in acceleration. The gradient of a horizontal line is 0, the velocity is not changing and so at this point the object is not accelerating or decelerating.

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