A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is 20 m/sec 16 m/sec 22 m/sec 18 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
Time of flight of a projectile on a horizontal plane, is 2u cosα/g 2u cotα/g 2u sinα/g 2u tanα/g TRUE ANSWER : ? YOUR ANSWER : ?
The centre of gravity of a plane lamina will not be at its geometrical centre if it is a Rectangle Right angled triangle Equilateral triangle Circle TRUE ANSWER : ? YOUR ANSWER : ?
On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts Downwards at its upper end Away from the wall at its upper end Upwards at its upper end Towards the wall at its upper end TRUE ANSWER : ? YOUR ANSWER : ?
Williot-Mohr diagram is used to determine deflection in Trusses only Rigid frames only Any type of structure Beam only TRUE ANSWER : ? YOUR ANSWER : ?
A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is 1.5 m/sec 1.0 m/sec 2.5 m/sec 0.5 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at 45° 60° 30° 90° TRUE ANSWER : ? YOUR ANSWER : ?
One end of an elastic string of natural length / and modulus X is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance x, held at rest and then released. The motion is a rectilinear motion with constant speed a simple harmonic motion a damped oscillatory motion None of these TRUE ANSWER : ? YOUR ANSWER : ?
A symmetrical body is rotating about its axis of symmetry, its moment of inertia about the axis of rotation being 2 kg -m2 and its rate of rotation 2 revolutions/see. The angular momentum of the body in kg-m2/sec is 4 8TC 8 6 7i TRUE ANSWER : ? YOUR ANSWER : ?
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is 0.5 0.4 0.55 0.3 TRUE ANSWER : ? YOUR ANSWER : ?