77. In a framed structure, as shown in the below figure, the force in the member AC is numerically equal to the force in member BC.
78. The force which acts along the radius of a circle and directed towards the centre of the circle is known as centripetal force.
79. Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
80. Concurrent forces are those forces whose lines of action
81. Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
82. According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
83. Fill up the blanks using suitable alternative: I have my bed room .........?
84. ......... had Ravi been so happy before.?
85. Which of the following is used in making explosives?
86. A machine having an efficiency less than 50%, is known as
87. The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called
88. Which is a disease caused by disorder of the respiratory system?
89. The unit of mass moment of inertia in S.I. units is kg-m2.
90. Fill Up the blanks : It is time you ...................?
91. A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m / s2 in the direction of which it acts.
92. The acceleration of a particle moving with simple harmonic motion, at any instant is given by
93. The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.
94. If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be
95. Permanent magnets are made of alloys is?
96. The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.
97. Phylloquenone is the Chemical name of?
98. Japanese art of flower arrangement:?
99. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
100. A smooth cylinder lying on a __________ is in neutral equilibrium.