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physics

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A robot probe drops a camera off the rim of a 245 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2.
Find the velocity with which it hits the
ground. Answer in units of m/s.

2)Find the time required for the camera to reach
the ground.
Answer in units of s.

please show work

  • physics - ,

    hf=hi+vi*t -1/2 * 3.7*t^2
    hf=0,hi=245, vi=0 solve for time t

    vf=3.7m/s * time

  • physics - ,

    V^2 = Vo^2 + 2gad,
    V^2 = 0 + 2 * 3.7 * 245 = 1813,
    V = 42.6 m/s.

    2. d = 0.5at^2 = 245 m
    0.5 * 3.7 * t^2 = 245,
    1.85 * t^2 = 245,
    f^2 = 245 / 1.85 = 132.4,

    t = 11.5 s.

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