Physics Past Questions and Answers

A force of ICON stretches an elastic string to a total length of \(20 \mathrm{~cm}\). If an additional force of ICON stretches the string \(5 \mathrm{~cm}\) further, find the natural length of the string.

Two drivers \(\mathrm{G}\) and \(\mathrm{H}\) are at depths
\(20 \mathrm{~m}\) and \(40 \mathrm{~m}\) respectively below the water surface in a lake. The pressure on \(G\) is'P. while the pressure on \(\mathrm{H}\) is \(\mathrm{P} 2\). If the atmospheric pressure is equivalent to \(10 \mathrm{~m}\) of water, the value of \(\mathrm{P} / \mathrm{P} 1\) is ____________

The areas of the effort and load pistons of a hydraulic press are \(0.5 \mathrm{~m}\) and \(5 \mathrm{~m}\) respectively. If a force \(F 1\) of \(100 \mathrm{~N}\) is applied on the effort piston, the force F20 in the load is ____________

A metal cube of volume \(10 \mathrm{~mm}^{3}\) is lowered into a measuring cylinder. containing water. If the Internal crosssectional area of the cyllinder is \(1-5 x\) \(10^{2} \mathrm{~mm}^{2}\) by how much does the water level rise in the cylinder?

A uniform cylindrical block of wood floats in water with one-third of Its height above the water. In a llquid of relatlve density \(0.8\). what fractlon of Its helght will be above the liquid level?