Physics Past Questions and Answers

A stone, Q is thrown with velocity U at an angle of 75^o to the horizontal. Another stone R is thrown with the same velocity U but with an angle of 15^o to the horizontal. The ranges covered by the stones will be

A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output?

A machine requires 1000J of work to raise a load of 500N through a vertical distance of 1.5m. Calculate the efficiency of the

In an experiment to determine Young's Modulus for a wire, several loads are attached to the wire and the corresponding extension measured. The tensile stress in each case depends on the

If a plastic sphere floats in water (density = 1000kgm³) with 0.5 of its volume submerged, and floats in oil with 0.4 of its volume submerged the density of the oil is