I have this exercise in physics, that i just don't know how to do.
"A child is spinning a 100g toy, which is attached to a 30cm long rope on a vertical level.
How much force does the rope have to handle?"
Well, the problem for me is, that there's no time given, how long it takes the child to spin it around or speed.
a = w^2 * r
w = v/r
w = φ-φo / delta t
w = φ/t
φ = 360 degrees = 2pi
The Attempt at a Solution
Don't think i can use a = 9.8 m/s^2 for this, to find w and then the other things. Or may be it's just a trick exercise and the solution is just like F = m*a = 0.01m * 9.8m/s^2 = 0.98N?
But then again, the length of the rope should change the force that they toy has on the rope or is that not the case?