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29.4
29.4 m/s
19.6 meters per second
5*9.8 = 49 metres per second.
An object dropped from rest will have a downward velocity of (9 g) = 88.2 meters per second after 9 seconds. Ignoring air resistance, the mass of the object is irrelevant. All masses fall with the same acceleration, and have the same downward velocity after any given period of time.
98
29.4
194fps
Diving is generally taken to mean that you start from rest and jump. If Superboy dives off the building, he would initially have had zero velocity, relative to the building.
29.4 m/s
19.6 meters per second
Acceleration = (change in velocity) / (time for the change)9.8 = (change in velocity) / (2 seconds)9.8 x 2 = change in velocity = 19.6 meters per second .Hint: The mass of the object and the height of the building are there just tothrow you off balance. You don't need either of them to answer the question.
In two seconds of fall, the speed increases 19.6 meters (64.4 feet) per second. The magnitude of velocity increases by that amount, while the direction of velocity doesn't change.
KE = 1/2 M V2 = 1/2 (2) (20)2 = 400 kg-m2/sec2 = 400 joules
5*9.8 = 49 metres per second.
.. You need the height of the building to figure it out..?
If the ball was dropped from a roof and hit the ground 3.03 seconds later, then when it hit the groundits velocity was 29.694 meters (97.42 feet) per second (rounded) downward.