71101. The minimum force required to slide a body of weight W on a rough horizontal plane is
71102. The moment of inertia of a square of side a about its diagonal is
71103. The angular velocity (in rad / s) of a body rotating at N revolutions per minute is
71104. The maximum efficiency of a lifting machine is
71105. The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
71106. The process of finding out the resultant force is called __________ of forces.
71107. A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
71108. In a framed structure, as shown in the below figure, the force in the member BC is
71109. The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.
71110. If a number of forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are not in equilibrium.
71111. The periodic time of a particle with simple harmonic motion is __________ proportional to the angular velocity.
71112. The motion of a particle round a fixed axis is
71113. A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
71114. If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
71115. The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
71116. A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is
71117. If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium.
71118. Newton's second law motion __________ a relation between force and mass of a moving body.
71119. Which of the following are vector quantities?
71120. The maximum acceleration of a particle moving with simple harmonic motion is
71121. A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.
71122. Non-coplaner concurrent forces are those forces which
71123. The best approximation of Square root of 2 among the value is
71124. 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.
71125. The force which acts along the radius of a circle and directed towards the centre of the circle is known as centripetal force.
71126. Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
71127. Concurrent forces are those forces whose lines of action
71128. Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
71129. According to the law of moments, if a number of coplaner forces acting on a particle are in equilibrium, then
71130. A machine having an efficiency less than 50%, is known as
71131. 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
71132. The unit of mass moment of inertia in S.I. units is kg-m2.
71133. 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.
71134. The acceleration of a particle moving with simple harmonic motion, at any instant is given by
71135. 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.
71136. If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be
71137. The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.
71138. 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.
71139. A smooth cylinder lying on a __________ is in neutral equilibrium.