A 2.0 kg yo-yo swings in a vertical circle on the end of a 1.0 m string. At the bottom of its swing the yo-yo has a speed of 4.0 m/s. What is the force of tension in the string at this point?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the answer is a)

mark brainliest

not too sure thinking all accelerations are pointed down