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kyledsmith18
20.03.2021 •
Physics
At one instant, an object is moving straight up at 80 meters per second. Four seconds
later, its speed should be about
O 100 m/s.
O 50 m/s.
O 90 m/s.
O 60 m/s.
O 40 m/s.
Solved
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Ответ:
60 m/s
Explanation:
v = ?
lamda = 0.5 m
f = 120 Hz
v = 120 × 0.5
v = 60 m/s