A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
The shape of a suspended cable under its own weight, is
The resultant of two forces acting at right angles is 34 kg and acting atiskg. The forces are
A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,
The intrinsic equation of catenary is
The units of inertia of mass, are
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on
If a spherical body is symmetrical about its perpendicular axes, the moment of inertia of the body about an axis passing through its centre of gravity as given by Routh's rule is obtained by dividing the product of the mass and the sum of the squares of two semi-axes by n where n is
A ball is dropped from a height of 2.m on a smooth floor and rises to a height of 1.m after the bounce. The coefficient of restitution between the ball and the floor is
Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down
A Seconds pendulum executes
Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
The equation of motion of a particle starting from rest along a straight line is x = t3 - 3l2 +The ratio of the velocities after 5 sec and 3 sec will be
A particle moves with a velocity of 2 m/sec in a straight line with a negative acceleration of 0.1 m/sec2. Time required to traverse a distance of 1.5 m, is
If two forces of 3 kg and 4 kg act at right angles to each other, their resultant force will be equal to
The velocity of a moving body, is
The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is
Power can be expressed as
The following statement is one of the laws of Dynamic friction
Effect of a force on a body depends upon its
The units of moment of inertia of an area, are
A number of forces acting simultaneously on a particle of a body
Time required to stop a car moving with a velocitym/sec within a distance ofm, is
The velocity of a body fallen from height h, on reaching the ground is given by
For a simple pendulum, time period for a beat, is
A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight
A sphere is resting on two planes BA and BC which are inclined atandrespectively with the horizontal. The reaction on the plane BA will be
Kinetic friction may be defined as
A ball of massg moving on a smooth horizontal table with a velocity ofm/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be
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