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How fast does a rock free fall in feet per second?
The speed keeps increasing. At any instant, the speed is 32.2 feet per second faster than it was 1 second earlier. That number is called the "acceleration of gravity".
Explain per second per second?
"Per second per second" is a measurement of acceleration. If an object (such as a car) is moving, its speed can be measured in terms of miles per hour, or feet per second (which work out to be a similar figure to miles per hour). If the car is accelerating, the acceleration can be measured in terms of additional speed (feet per second) that is acquired in a given second, therefore, feet per second per second. Get it?
What is the velocity of a helicopter traveling 6 feet per second?
Its speed is 6 feet per second. Its velocity is 6 feet per second in whatever direction it's going.
A speed of 60 miles per hour is equal to a speed of 88 feet per second find the speed in miles per hour of an aircraft travelling 1000 feet per second?
There are 3600 seconds per hour, and 5280 feet per mile. You can use those two numbers to convert from feet per second to miles per hour. Just make sure the units are right when you are finished.
What is the speed of an object descending at 6 feet per second?
The speed is 4.1 miles per hour.
