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Monica [59]
3 years ago
14

A rock is dropped from rest. How fast is it going after it has been falling for 9.2 s?

Physics
1 answer:
natka813 [3]3 years ago
6 0

90.2 m/s. A rock dropped from rest after it has falling for 9.2 seconds will have a velocity of 90.2m/s.

The bodies left in free fall increase their speed (downwards) by 9.8 m/s² every second. The acceleration of gravity is the same for all objects and is independent of the masses of these. In the free fall the air resistance is not taken into account.

v = g*t

v = (9.8m/s²)(9.2s) = 90.2 m/s

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