explain clearly what gravity acceleration is?

Answer 1

we'll just overlook that first answer. First of all gravity pulls. The force of gravity on Earth is 9.81 m/s^2.

what that translates to is 9.8 meters per second per second. So for every second you fall under the influence of gravity on Earth, you accelerate at 9.81 meters per second.

So after falling for one second you are travelling 9.8 meters per second, after 2 seconds you are travelling at 19.6 meters per second, after 3 seconds you are travelling at 29.4 meters per second, and so and so forth.

thats about as clear as i can make it!

and to clarify that is not taking into account air resistance and such...

Answer 2

Acceleration, caused by anything, is simply a change in velocity over time. In math talk, we write that as a = del v/del t; where del means "change in" and v and t are the velocity and time variables.

A net force applied to a body will cause it to accelerate...that's a fundamental law of physics. We write that F = ma; where m is the mass of the body. F, the force, can come from serveral sources...one of which is gravity.

The force of gravity is frequently called "weight". Your weight, that you can see on a bathroom scale, is just the force of gravity measured in pounds for example. Often we write F = W = ma; where W is weight, which is the force of gravity.

When we write W = ma, we specify the acceleration (a) as the acceleration due to gravity and write it as "g," so that W = ma = mg. g is the free-fall acceleration of a body (m) due to the force of gravity (W) or weight.

Long ago, it was discovered that, no matter what the force of gravity was, the free-fall acceleration of the falling body would always be the same. And for near Earth's surface, g always is about 32.2 ft/sec^2 or, in SI metrics, about 9.81 m/sec^2.

Think of it, no matter how much you weigh, you will fall to Earth accelerating at 32.2 ft/sec^2. Thus, for example, an elephant will fall to Earth at that acceleration and a golf ball will fall at that same rate. This means that, if both are dropped simultaneously from the same height, they will hit the ground at the same time.

Amazing.

Answer 3

Gravity pushes down onto objects, and is opposed by a normal force, pushing up on the object. To calculate the force gravity use the F=ma formula, where the mass is in Kg, and the acceleration used is the 9.81 m/s squared, which is the force that gravity is pushing down on.

ex. m=33kg, find the force of gravity pushing down on this object

F=ma
F=33kg x 9.81m/s squared

Force of gravity= 323.7Newtons