bellagracebulle8018
28.10.2019 •
Physics
Aball is thrown upwards. after 2.5s, it has risen 50m. at what velocity was it thrown upwards? assume g = 10m/s squared.
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Ответ:
32.5 m/s
Explanation:
Given:
Δy = 50 m
a = -10 m/s²
t = 2.5 s
Find: v₀
Δy = v₀ t + ½ at²
(50 m) = v₀ (2.5 s) + ½ (-10 m/s²) (2.5 s)²
v₀ = 32.5 m/s
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