Question

define acceleration​

Answer 1

Answer:

acceleration is defined as change in velocity

Explanation:

v-u/t

Answer 2

Answer:

In physics, 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

                              OR

The speed is 20 m/s, and the direction is "downward". Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

The average acceleration of an object can be calculated using the following equation: a = (vf - vi) / (tf - ti) where a = average acceleration, vf = final velocity, vi = initial velocity, tf = final time and ti = initial time. The units for acceleration are distance/time^2; for example, m/sec^2.