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Posted by on Tuesday, January 22, 2013 at 8:47pm.

A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2

  • Physics - , Tuesday, January 22, 2013 at 9:38pm

    Vi=0, t=3.8s, a=g=10m/s^2, and Vf=?. Use Vf=Vi +at, which turns into Vf= (10m/s^2)(3.8s). Initial velocity in the y-direction is 0.

  • Physics - , Wednesday, January 23, 2013 at 5:35am

    v(x0) =v(x)=8 m/s
    v(y0) =0
    v(y)=gt=10•3.8=38 m/s
    v=sqrt{v(x)² +v(y)²} =
    =sqrt (8²+38²) = 38.8 m/s

  • Physics - , Sunday, December 15, 2013 at 9:22pm

    An autographed baseball rolls off of a 1.1 m
    high desk and strikes the floor 0.15 m away
    from the desk.
    How fast was it rolling on the desk before
    it fell off? The acceleration of gravity is
    9.81 m/s
    Answer in units of m/s

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