List of top Questions asked in EAMCET- 2007

The apparent weight of a person inside a lift is w1 when lift moves up with a certain acceleration and is w2 when lift moves down with same acceleration. The weight of the person when lift moves up with constant speed is

Given two vectors $ A\to =-\widehat{i}+2\widehat{j}-3\widehat{k} $ and $ B\to =4\widehat{i}+2\widehat{j}-6\widehat{k}. $ . The angle made by $ (A\to +B\to ) $ with x-axis is

A block of mass 2 kg is placed on the surface of a trolley of mass 20 kg which is on a smooth surface. The coefficient of friction between the block and the surface of the trolley is 0.25. If a horizontal force of 2 N acts on the block, the acceleration of the system in $ m{{s}^{-2}} $ is $ (g=10m{{s}^{-2}}) $

A body of mass 2 kg is thrown up vertically with kinetic energy of 490 J. If $ g=9.8\text{ }m/{{s}^{2}}, $ the height at which the kinetic energy of the body becomes half of the original value, is

A sphere of mass m moving with constant velocity $ \mu $ , collides with another stationary sphere of same mass. If e is the coefficient of restitution, the ratio of the final velocities of the first and second spheres is

If force (F), work (W) and velocity (v) are taken as fundamental quantities, then the dimensional formula of time (T) is

The radius of gyration of a rod of length L and mass M about an axis perpendicular to its length and passing through a point at a distance L/3 from one of its ends is

Two rods of different materials with coefficients of linear thermal expansion $ {{\alpha }_{1}},{{\alpha }_{2}} $ and Youngs moduli Y1 and Y2 respectively are fixed between two rigid walls. They are heated to have the same increase in temperature. If the rods do not bend and if 0.1 : a: = 2: 3, then the thermal stresses developed in the two rods will be equal when $ {{Y}_{1}}:{{Y}_{2}} $ is equal to