Physics - NLM Question with Solution | TestHub

An object of mass$10 \mathrm{kg}$is connected to the lower end of a massless string of length$4 \mathrm{m}$hanging from the ceiling. If a force$F$is applied horizontally at the mid-point of the string, the top half of the string makes an angle of$45°$with the vertical, then the magnitude of$F$is