Question

define acceleration and give its si unit when it is acceleration of a body negative gift to example of situation in which acceleration of the body is negative

Answer 1

Acceleration of an object may be defined as the rate of change in velocity of the objects.

Acceleration = Change in velocity / time taken.

SI unit of acceleration = ms upon -1 / s = ms -2

Answer 2

Definition of acceleration -

Rate of change of velocity is called acceleration ( a ).

a = (v-u)/t

SI UNIT -

$ms {}^{ - 2}$

Negative acceleration is also called deceleration or retardation.

Eg; deceleration is seen when brakes are applied on a vehicle.