Asked by Sierra

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.)
Answered by Sierra
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.)
Answered by bobpursley
At the top,

mv^2/r=mg
v= sqrt(rg)
Answered by Anonymous
2.2m/s
Answered by Emily
Could someone explain how to do this?
Answered by Anonymous
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
Answered by Anonymous
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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