Englishfor English speakers
collective
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adjective
(= corporate)
done by or characteristic of individuals acting together
a joint identity
the collective mind
the corporate good
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noun
members of a cooperative enterprise
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adjective
forming a whole or aggregate
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adjective
set up on the principle of collectivism or ownership and production by the workers involved usually under the supervision of a government
collective farms
acceleration
Noun
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Acceleration is a change in speed.
As the plane took off, the acceleration pressed her into her seat.
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Acceleration is by how much a speed or velocity goes up.
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derivative for velocity,has formula matha=\lim_{\Delta x \to 0}\frac{\Delta v}{\Delta t}/math .