9.8 meters per second per second?

Question

What exactly does this mean? Does this mean that the velocity of an object falling to the earth increases exponentially, or is the second "per second" just an obnoxiously correct way of saying that an object falls to the earth at 9.8 meters a second, EVERY second--like me saying "The car is averaging 50 miles per hour, per hour."

Another way of asking this is, would it be just as accurate to say that an object falls towards the earth at 9.8 meters per second per hour? per month? per year?

(yeah honaye I know, nothing is going to fall for a year without meeting some resistance first.)

Answer 1

nope thats the acceleration so every second thats how much the speed increases

Answer 2

9.8 Meters Per Second Squared

Answer 3

9.8 Meters Per Second

Answer 4

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Meters second ² simply means that your velocity will increase by some value every second. For instance, 9.8 m/sec² means that your velocity will increase by 9.8 meters per second every second. If you continue to accelerate at that rate, after 10 seconds you'll be moving at 98 meters/second.

Answer 5

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RE:
9.8 meters per second per second?
What exactly does this mean? Does this mean that the velocity of an object falling to the earth increases exponentially, or is the second "per second" just an obnoxiously correct way of saying that an object falls to the earth at 9.8 meters a second, EVERY second--like me saying "The...

Answer 6

9.8 m/sec/sec is also written as 9.8 m/sec^2...this is acceleration.

It means that a falling object will go from 0 to 9.8 m/sec in the first sec. It will then go to 19.6 m/sec in the 2nd second. It will go to 29.4 m/sec in the 3rd second...and so on. So it should continually keep on accelerating - each second it will be falling FASTER than the previous second by 9.8 m/sec.

Obviously there are limits to this (it hits bottom, air resistance, the speed of light, etc.)

Note this also:

velocity (v) of an accelerating object = a * t
t = time it's been accelerating (in sec)
a = acceleration rate (in m/sec/sec)
So [a * t] = [m/sec/sec]*[sec] = [m/sec]
(in unit terms, this is speed or velocity)

Answer 7

What 9.8 m/s/s or 9.8 m/s^2 means is that after 1 sec. of freefall, it's going 9.8 m/s, after 2 sec. it's doing 19.6 m/s, after 3, 29.4 m/s, et al. Another way to say it would be that an object in freefall's velocity is increasing by 9.8 m/s every second.

In everyday experience, the final velocity is normally limited by air resistance (Terminal velocity), or like you said, it'll hit bottom.

Answer 8

9.8 m/s/s means that the velocity of the object increases by 9.8 m/s in one second. It would tell you that velocity is linearly increasing with time. Remember that acceleration is the change in velocity per unit time and velocity is the change in position per unit time. Saying 9.8 m/s per hour is totally different and would imply and much slower acceleration.

Answer 9

This is about accleration due to gravity, which is approx. 9.8 m/s/s over short distances near the surface of the Earth. The velocity is increasing at a constant rate, not exponential. You can work in other units of distance and time if you want to.

Answer 10

It's called the "acceleration of a free falling body on Earth" technically. In other words, it is measure of how fast your speed will increase when you sky jump from a plane. The higher you fall from, the more time you will take to fall down, thus Earth's gravitational pull increases your speed by 9.8m/s with every passing second (that value is lesser on mars). Thus more the height, more the number of broken bones.

Answer 11

It is acceleration, the velocity of free-falling object increases linearly in time. After elapsing each second the velocity is increased by another amount of 9.8 m/s.