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Posted by on Friday, June 22, 2012 at 5:22pm.

Consider the motion of the rock in the figure below. What is the minimum speed the rock can have without the string becoming "slack"? (The rock is traveling in vertical circle. Assume that m = 1.6 kg and r = 0.48 m.)

  • Physics - , Friday, June 22, 2012 at 5:23pm

    What is the minimum speed the rock can have without the string becoming "slack"? (The rock is traveling in vertical circle. Assume that m = 1.6 kg and r = 0.48 m.)

  • Physics - , Friday, June 22, 2012 at 5:47pm

    At the top,

    mv^2/r=mg
    v= sqrt(rg)

  • Physics - , Tuesday, January 28, 2014 at 5:57pm

    2.2m/s

  • Physics - , Monday, February 10, 2014 at 9:04pm

    Could someone explain how to do this?

  • Physics - , Saturday, February 15, 2014 at 2:39pm

    the equation is A(c)= v^(2)/r

    solve for v, which is v=[A(c) x r]^(1/2)

    A(c)=9.81, r=radius=.48m, mass is irrelevant.

    solve for v: v= [9.81 x .48]^(1/2)
    v= [4.7088]^(1/2)
    v= 2.169

  • Physics - , Saturday, August 2, 2014 at 9:07pm

    Mars has two moons, Phobos and Deimos. It is known that the larger moon, Phobos, has an orbital radius of 9.4 106 m and a mass of 1.1 1016 kg. Find its orbital period.

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