71. When a body of mass M1 is hanging freely and another of mass M2 lying on a smooth inclined plane ($$\alpha $$) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by
72. If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by
73. The resultant of the forces acting on a body will be zero if the body
74. For a body moving with simple harmonic motion, the number of cycles per second, is known as its
75. 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
76. One end of an elastic string of natural length ‘l’ 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
The motion is
77. A bullet weighing 10 gm moves with a velocity of l km/sec. Its kinetic energy is
(i) 5000 Nm
(ii) 5000 kg.m
(iii) 5000 J
(i) 5000 Nm
(ii) 5000 kg.m
(iii) 5000 J
78. The product of mass and velocity of a moving a body, is called
79. One half of a vibration of a body, is called
80. The C.G. of the shaded area of the below figure whose curve OM is a parabola from y-axis, is
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