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A gun that is spring-loaded shoots an object horizontally. The initial height of the gun is h=5 cm and the object lands 20 cm away. What is the gun's muzzle velocity?

Do i use something like v=sqr(k)/m*x. I am getting something like 3.2, is this somewhat correct at all.

  • Physics - ,

    3.2 with what dimensions?

    The muzzle velocity Vx is given by
    Vx*T = 0.2 m

    where T is the time it takes the bullet to fall 0.05 m.

    0.05 m = (1/2) g T^2
    T = sqrt (0.101 s)

    Complete the solution for Vx = 0.2m/T, , the muzzle velocity

  • Physics - ,

    I am getting .625m/s with your way, but the choices I have are
    a. 2.0 m/s
    b. 1.0 m/s
    c. 3.2 m/s
    d. 4.9 m/s
    e. 3.9 m/s

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