what is acceleration?write its formula and siunit what is the main difference between +ve and -ve acceleration?
Answers
Acceleration is the rate of change of velocity of an object with respect to time. • An object's acceleration is the net result of all forces acting on the object, as described by Newton's Second Law. • The SI unit for acceleration is metre per second squared (m s−²).
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down. ... Thus, this object also has a positive acceleration.
Defination =
:Time in velocity rate of relative change .
Formula =
a = v/t
a= acceleration
v= velocity
t=time
Main difference between +ve and -ve accelerition = 0