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What is the velocity of a rock falling off of a cliff after half a second?
Wiki User
∙ 14y ago
The rock accelerates at approximately 9.8 meters per second per second, or 9.8m/s2. Therefore, at the moment of impact it's instantaneous velocity is approximately 34.3 m/s. 9.8 m/s2 x 3.5 s = 34.3 m/s
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoAssuming gravity effects to be 9.8m/s/s the answer would be 29.4m/s
Howevers, on a more vague assumption of the effects of gravity to be 10/m/s/s it would be 30m/s
Moreover, this ignores the effects of air resistance
Wiki User
∙ 14y agoThe acceleration of gravity is roughly 9.8 meters (32.2 feet) per second2.
Speed at any time = (acceleration) multiplied by (time).
After 1/2 second, it's (9.8/2) = 4.9 meters per second (16.1 feet per second)
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