4,815 mph
It is traveling about 51.3 feet every second.
Per second per second or (/s/s) refers to the rate of acceleration. If you are standing still and you increase your speed at a rate of 5 feet per second per second that means after 1 second you'll be moving at 5 feet per second, after two seconds you'll be moving at 10 feet per second, after three seconds you'll be moving at 15 feet per second, and so on. Every second that goes by, 5 more feet per second will be added to your speed. So 5ft/s/s is a rate of acceleration. An easier example to understand, instead of per second per second, is per hour per second. If you are in a car that is standing still and you increase your speed at a rate of 5 miles per hour per second that means after 1 second you'll be traveling at 5 miles per hour. After 2 seconds your speed will have reached 10 mph. After 10 seconds you'll be traveling at 50mph. Each second that goes by you add 5mph to the speed.
Speeds are given in terms of distance per time (for example, miles per hour is a common unit for speed). This means that you simply divide 50 feet by 3 seconds to get 16.67 feet per second. That is a perfectly valid unit for speed, but you could express the same speed as 5.08 meters per second or 11.36 miles per hour.
1 mile = 5,280 feet. 1 hour = 3,600 seconds (60 seconds / minute * 60 minutes / hour) Therefore 1 mile / hour = 5,280 feet / 3,600 seconds = 1.47 feet / second. So to convert miles per hour to feet per second, multiply by 1.47. And to convert feet per second to miles per hour, divide by 1.47. So for example 110 feet per second = 110 / 1.47 mph = 75 mph. And if you had it the other way, you'd take 75 mph * 1.47 to get 110 feet per second. BTW, if you're trying to figure out how fast a 75 mph fastball gets to a hitter, first figure out that it travels 110 feet per second, and then divide 60.5 (the number of feet from the mound to homeplate) by 110 (the number of feet the ball would travel in one second) and get 0.55 seconds. So a 75 mph fastball takes just over half a second to reach the batter.
Feet per second x 0.3048 = meters per second.
75 feet per second; about 50 mph.
3 feet = 1 yard 7,062 feet = 2,354 yards
You would be moving impossibly fast, at the rate of 2520000 Mph.
If a car is moving at 100 feet per second, then it is traveling at 100 feet per second.
A dot that moves over 43 feet in 1.5 seconds is moving at the rate of 43 feet per 1.5 seconds, or 28.666... (28 2/3) feet per second.
About 1,076.03 feet per second.
250 feet per second = 170.45 mph
300 feet per second = 204.54 mph
44 feet per second.
150 feet per second.150 feet per second.150 feet per second.150 feet per second.
Fast. It is equivalent to 1,122 feet every second.
64 feet per second.