The resultant of the forces acting on a body will be zero if the body
Ball A of massg moving on a smooth horizontal table with a velocity ofm/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be
Lami's theroem states that
A body is said to move with Simple Harmonic Motion if its acceleration, is
A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle ofand its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.the velocity of the ball after impact will be
For maximum range of a projectile, the angle of projection should be
According to Law of Triangle of Forces
Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,
A spring scale in a stationary lift shows a reading ofkg for a man standing on it. If the lift starts descending at an acceleration of g/the scale reading would be
One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.m and of weightkg. The reaction between the sphere and the wall of the arrangement made is
For a body moving with simple harmonic motion, the number of cycles per second, is known as its
A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two polesm apart. If the horizontal tension iskg, the central dip of the cable is
Pick up the incorrect statement from the following :
A pilot flies a small plane in a vertical loop of radius r. At the top of its trajectory he experiences weightlessness. If the acceleration due to gravity is g, the speed of the plane at the top of its trajectory would be
Newtons's Law of Motion is :
A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length
For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is
If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is
Which one of the following laws is not applicable to a simple pendulum ?.
If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is
If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is
Principle of Transmissibility of Forces states that, when a force acts upon a body, its effect is
Akg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale readskg. The velocity of the elevator will be
The reaction at the support B of the beam shown in below figure is
The motion of a particle is described by the relation x = t2- 10t +where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t =seconds would be
The following is not a law of static friction :
One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.m and of weightkg. The tension in the string is
For lifting a load ofkg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance ofcm. The efficiency of the lifting machine, is
If the angle between the applied force and the direction of motion of a body, is betweenand 180°, the work done, is called
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