positive acceleration


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positive acceleration

Increase in the rate of change in velocity per unit of time.
See also: acceleration
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References in periodicals archive ?
The source of this unforeseen positive acceleration has come to be known as "dark energy".
The motion of the toy car they monitored would produce a negative velocity graph and a positive acceleration graph.
The X-43A demonstrated its unique capability after separating from a rocket booster and, under scramjet power, achieving positive acceleration at the hypersonic speed of nearly Mach 7 -- approximately 5,000 miles per hour.