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Answer:
0.5 seconds
Step-by-step explanation:
Remember, at the highest point, a projectile's vertical velocity is 0.
Given:
v₀ = 8 sin 40° m/s
v = 0 m/s
a = -9.8 m/s²
Find: t
v = at + v₀
0 = -9.8t + 8 sin 40
t = (8 sin 40) / 9.8
t ≈ 0.5
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