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Physics, newtons laws

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A bullet is fired with a certain velocity at an angle above the horizontal at a location where g= 10.0 m/s^2. The initial x any components of its velocity are 86.6 m/s and 50 m/s respectively. How long does it take before the bullet hits the ground?

  • Physics, newtons laws -

    v₀=sqrt{v₀² (x) +v₀²(y)}=
    =sqrt{86.6²+50²} =
    =100 m/s.

    tan α= v₀(y)/v₀ (x)=50/86.6
    α= tan ⁻¹(50/86.6) =30°

    t= 2vₒ•sinα/g

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