Q:
# What is the definition of constant acceleration?

**Constant acceleration is a change in velocity that doesn't vary over a given length of time.** If a car increases its velocity by 20 mph over the course of a minute, then increases by another 20 mph the next minute, its average acceleration is a constant 20 mph per minute.

Credit:
NRMA Motoring and Services
CC-BY 2.0

The rate of acceleration due to the Earth's gravity is a constant 9.8 meters per second per second. An object in free fall continues to accelerate at a constant rate; but as a falling object's velocity increases, so does the force of drag caused by air resistance. When the force of drag equals the Earth's gravitational pull, the acceleration becomes zero, and the object continues to fall at a constant speed. Physicists call this final speed the terminal velocity.

Learn more about Motion & Mechanics-
Q:
## What is the free-fall equation?

A: The equation to calculate a free-falling object's velocity or time spent falling is velocity equals gravitational acceleration multiplied by time. This occ... Full Answer >Filed Under: -
Q:
## What Is the Formula for Velocity?

A: The basic formula for velocity is v = d / t, where v is velocity, d is displacement and t is the change in time. Velocity measures the speed an object is t... Full Answer >Filed Under: -
Q:
## What is the angular acceleration formula?

A: While there are several formulas for angular acceleration, the basic equation is the change in angular velocity divided by the change in time. This relatio... Full Answer >Filed Under: -
Q:
## What is the difference between acceleration and deceleration?

A: Acceleration refers to the change in velocity of a moving object within a certain period of time, either to a slower or faster pace, while deceleration exc... Full Answer >Filed Under: