71301. A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is(where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)
71302. The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as
71303. The efficiency of a lifting machine is the ratio of
71304. A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
71305. The length of a second's pendulum is
71306. The slope on the road surface generally provided on the curves is known as
71307. Coplaner non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.
71308. The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is
71309. A pendulum which executes one beat per second is known as
71310. Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.
71311. D' Alembert's principle basically depends upon Newton's second law of motion.
71312. The forces, whose lines of action are parallel to each other and act in the same directions, are known as
71313. A number of forces acting at a point will be in equilibrium, if
71314. Cricket bat are made up with .........- trees?
71315. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.
71316. In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively
71317. The acceleration of a particle moving with simple harmonic motion is proportional to the displacement of the particle from the mean position.
71318. The unit of moment of inertia of an area is
71319. The moment of inertia of a thin rod of mass m and length l,about an axis through its centre of gravity and perpendicular to its length is
71320. When a body of mass m attains a velocity v from rest in time t, then the kinetic energy of translation is
71321. The unit of angular velocity is
71322. If a number of forces are acting at a point, their resultant is given by
71323. A force acting in the opposite direction to the motion of the body is called force of friction.
71324. For any system of coplaner forces, the condition of equilibrium is that the
71325. The ratio of static friction to dynamic friction is always
71326. A science teacher claimed that Newton's third law of motion is involved while studying the motion of rockets. His statement is
71327. One kg force is equal to
71328. Coefficient of friction depends upon
71329. The kinetic energy of a body __________ upon its mass and velocity.
71330. According to Newton's first law of motion,
71331. The moment of inertia of a square of side (a) about an axis through its centre of gravity is
71332. The velocity ratio of a single purchase crab winch can be increased by
71333. The motion of a wheel of a car is
71334. If the efficiency of a lifting machine is kept constant, its velocity ratio is __________ propotional to its mechanical advantage.
71335. Non-coplaner non-concurrent forces are those forces which
71336. The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplaner concurrent forces.
71337. A force while acting on a body may
71338. A screw jack used for lifting the loads is
71339. The wheels of a moving car possess
71340. In order to determine the effects of a force, acting on a body, we must know
71341. The negative acceleration is called retardation.
71342. The maximum displacement of a body, from its mean position is called amplitude.
71343. A lifting machine lifts a load of 1000N through a distance of 0.2 m by means of an effort of 200N through a distance of 1m. This machine is an ideal one.
71344. When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is
71345. The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is
71346. The motion of the body from one extremity to the other is known as a beat.
71347. The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.
71348. A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.
71349. In which year was the Rolling Plan introduced?
71350. Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces.