71. 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
72. 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
73. A weight ‘W’ is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is
74. 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,
75. Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in below figure. The tension in the string is:
76. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is
77. Williot-Mohr diagram is used to determine deflection in
78. Total no of instantaneous centers of a machine having ‘n’ links, is
79. The acceleration of a train starting from rest at any instant is $$\frac{1}{{6\left( {{\text{V}} + 1} \right)}}{\text{m/se}}{{\text{c}}^2}$$ where ‘V’ is the velocity of the train in m/sec. The train will attain a velocity of 36 km/hour after travelling a distance of
80. A particle moves in a straight line and its position is defined by the equation x = 6t2 - t3 where t is expressed in seconds and ‘x’ in meters. The maximum velocity during the motion is
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