# 1) Define the term velocity.2) When is the acceleration positive and negative? URGENT!!!!

2
by Yasmin
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• Brainly User
2014-07-15T22:40:46+05:30
1) Velocity
It is defined as "displacement per unit interval of time".
Velocity,v = (Displacement) / time
2) Generally, acceleration is positive when the velocity increase with time and negative           when the velocity decreases with time.
2014-07-16T14:12:34+05:30

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The velocity of a body is the distance traveled by the body in a specified direction in a unit time interval. It is a vector quantity.

Acceleration is positive when the velocity of body increases with time, whereas it is negative when the velocity of body decreases with time.