Physics Classical Mechanics Help ASAP

A gunman standing on a sloping ground fires up the slope. The initial speed of the bullet is v0= 390 m/s. The slope has an angle α= 25 degrees from the horizontal, and the gun points at an angle θ from the horizontal. The gravitational acceleration is g=10 m/s2.

(a) For what value of θ ( where θ>α) does the gun have a maximal range along the slope? (in degrees, from the horizontal)

θ=


(b) What is the maximal range of the gun, lmax, along the slope? (in meters)

lmax=

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  1. a)
    Without an incline the ideal angle would be pi/4 = 45°

    to get theta:
    (90/2)+(α/2)

    b)
    since there is an incline we have to consider the angle α
    (1−sinα)*v0^2/(g*cos^2(α))

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  2. http://cnx.org/content/m14614/latest/

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    posted by Elena
  3. Thank you, Elena!

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    posted by Ilya

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