A $20$ kg child is on a swing. When the string is at a $45$ degree angle below the horizontal the child is momentarily at rest as the forward swing transforms into the back swing. Determine the tension in the two $2$ m ropes supporting the swing when the ropes are at $90$ degrees $($perpendicular$)$ to the horizontal.

Answer rating: 100% (QA)

To solve this problem well use the principles of equilibrium When the child is at rest the forces ac... View the full answer