Question

An air puck of mass 0.129 kg is tied to a string
and allowed to revolve in a circle of radius
0.96 m on a horizontal, frictionless table. The
other end of the string passes through a hole
in the center of the table and a mass of 1 kg
is tied to it. The suspended mass remains in
equilibrium while the puck revolves.
What is the tension in the string? The
acceleration due to gravity is 9.8 m/s
2

Answer 1

so, do you know where to start?

Answer 2

nope

Answer 3

draw a diagram, label all forces, write all variables and relevant equations

Answer 4

but i dont know what equation to use

Answer 5

draw the diagram first. that's how you always start any physics problem involving forces and motion and stuff like that.so then you're trying to find the tension in the string. the question tells you that the string and hanging mass are in equilibrium so that means that the tension in the string of the hanging mass must equal the weight of the hanging mass and also the tension also keeps the spinning puck in a uniform circular motion as well. so then for the puck\[T=m\frac{v^2}{r}\]and for the hanging mass\[T=Mg\]and those combined make\[Mg=m\frac{v^2}{r}\]then solve for v then plug that into the previous equation to find T. i think this would work. then again i'm not such a good student but this is what i would do. sorry in advance if it's wrong. i hope someone can make sure this is somewhat right.