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a bird flying horizontally accidently drops a rock it was carrying. 2.10s later,the rocks velocity is 22.2m/s in a -68.2 direction. what was the birds (and rocks) initial velocity

Respuesta :

MathPhys

Answer:

8.24 m/s

Explanation:

Given:

t = 2.10 s

v₀ᵧ = 0 m/s

vₓ = 22.2 cos(-68.2) m/s

aₓ = 0 m/s²

Find: v₀

In the x direction:

v = at + v₀

22.2 cos(-68.2) = (0) (2.10) + v₀ₓ

v₀ₓ = 8.24

v₀² = v₀ₓ² + v₀ᵧ²

v₀² = (8.24)² + (0)²

v₀ = 8.24 m/s

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