Question

what is acceleration???​

Answer 1

Answer:

Acceleration: It is a measure of the change in the velocity of an object per unit time. Acceleration can be caused either by change in direction of motion or change in speed or both

Acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. ... Acceleration is defined as the change in the velocity vector in a time interval, divided by the time interval.

Answer 2

Answer:

Acceleration :-

• Acceleration: It is a measure of the change in the velocity of an object per unit time.

• Acceleration can be caused either by change in direction of motion or change in speed or both.

$acceleration \times \frac{change \: in \: velocity}{time \: taken}$

• SI unit is ms-2.

• It is a vector quantity; the acceleration is taken to be positive if it is in the direction of velocity and negative when it is opposite to the direction of velocity.

• When you apply brakes on a car the velocity is in forward direction but acceleration is in backward direction, so acceleration will be negative. It is also called deceleration.

• When you are increasing the speed of a car the acceleration is positive as velocity and acceleration are in both in the forward direction

$a \times \frac{v - u}{t}$

$a = acceleration \: \\ u = initial \\ v = final \: velocity \\ t = time \: taken$