81. The velocity of a moving body, is
82. To double the period of oscillation of a simple pendulum
83. 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
84. The equation of motion of a particle starting from rest along a straight line is x = t3 - 3t2 + 5. The ratio of the velocities after 5 sec and 3 sec will be
85. The equation of motion of a particle starting from rest along a straight line is x = t3 - 3t2 + 5. The ratio of the accelerations after 5 sec and 3 sec will be
86. A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be
87. The angular speed of a car while taking a circular turn of radius 100 m at 36 km/hour, is
88. At the instantaneous center, the velocity of the moving lamina at any instant is
89. Which one of the following statements is true?
90. A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is
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