39901. If the gravitational accelerational at any place is doubled, the weight of a body, will
39902. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be
39903. A particle moves along a straight line such that distance x traversed in t seconds is given by x = t2(t + 1), the acceleration of the particle, will be
39904. The Law of Polygon of Forces states that
39905. Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by
39906. Which one of the following statements is true ?
39907. The beam shown in below figure is supported by a hinge at A and a roller at B. The reaction RA of the hinged support A of the beam, is
39908. The product of mass and velocity of a moving a body, is called
39909. Engineer's units of force, is
39910. Joule is the unit of
39911. The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is
39912. One Newton force, is
39913. The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is , the velocities of separation of the balls will be equal to
39914. The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called
39915. Work may be defined as
39916. A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
39917. The tension in a cable supporting a lift
39918. A satellite moves in its orbit around the earth due to
39919. If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by
39920. If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be
39921. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through
39922. When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as
39923. The resultant of two forces P and Q acting at an angle θ, is
39924. To attain the synchronous orbit, the launch of a satellite, is done from a place
39925. The vertical reaction at the support A of the structure shown in below figure, is
39926. Young one of turkey is known as--------
39927. If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is
39928. The total time of collision and restitution of two bodies, is called
39929. The length of a Second's pendulum, is
39930. 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
39931. A string of length 90 cm is fastened to two points A and B at the same level 60 cm apart. A ring weighing 120 g is slided on the string. A horizontal force P is applied to the ring such that it is in equilibrium vertically below B. The value of P is :
39932. The reaction at the support A of the beam shown in below figure is
39933. Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is
39934. The C.G. of a right circular cone lies on its axis of symmetry at a height of
39935. A uniform rod 9 m long weighing 40 kg is pivoted at a point 2 m from one end where a weight of 120 kg is suspended. The required force acting at the end in a direction perpendicular to rod to keep it equilibrium, at an inclination 60° with horizontal, is
39936. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
39937. The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface
39938. Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation
39939. Two forces of 6 Newtons and 8 Newtons which are acting at right angles to each other, will have a resultant of
39940. A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is
39941. A body is said to move with Simple Harmonic Motion if its acceleration, is
39942. 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 2.25 m and of weight 100 kg. The reaction between the sphere and the wall of the arrangement made is
39943. Which one of the following laws is not applicable to a simple pendulum ?.
39944. The ratio of the reactions RA and RB of a simply supported beam shown in below figure is
39945. Effect of a force on a body depends upon its
39946. The resultant of the forces acting on a body will be zero if the body
39947. A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
39948. 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
39949. A Seconds pendulum executes
39950. For maximum range of a projectile, the angle of projection should be
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