Question

A sphere of radius 25 cm and mass 1 kg is hung by a string of negligible mass and length 40 cm, then tension in the string is

Answer 1

From the given data we get that the angle is cos-1 25/40 which is equal to 51.37 now, we know that the tension = mg.

Therefore T * sintheta = mg or we get T* 51.37 = 1 * 10.

Or we get T = 10/0.78119 therefore value of the T = 12.8N.