71252. In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is
71253. The total motion possessed by a body, is called
71254. A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
71255. If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton's second law of motion,
71256. If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium.
71257. The friction experienced by a body, when at rest, is known as
71258. The moment of inertia of a solid sphere of mass m and radius r is
71259. The matter contained in a body, is called
71260. The centre of percussion is below the centre of gravity of the body and is at a distance equal to
71261. If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
71262. The forces, which do not meet at one point, but their lines of action lie on the same plane, are known as coplaner non-concurrent forces.
71263. If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, the forces shall be in equilibrium.
71264. The angle which the normal reaction makes with the resultant reaction is called angle of friction.
71265. 12 men can do a piece of work in 10 days.How many men would be required to do the same in 8 days?
71266. The law of the machine is(where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)
71267. In a framed structure, as shown in the below figure, the force in the member AB is __________ the force in member AC.
71268. Who among the following has been selected for the Evergreen Best Actor in British Film?
71269. The moment of the force P about O as shown in the below figure is
71270. According to lami's theorem
71271. Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __________ than that about X-X axis.
71272. The amplitude is always __________ radius of the circle.
71273. When a body falls freely under gravitational force, it possesses __________ weight.
71274. The centre of gravity of a quadrant of a circle lies along its central radius (r) at a distance of
71275. The reference to Hindus in Article 25 of the constitution does not include?
71276. A car covers the first 35 km of its journey in 45 minutes and covers the remaining 69 km in 75 minutes.What is the average speed of the car?
71277. The maximum mechanical advantage of a lifting machine is
71278. A machine having an efficiency greater than 50%, is known as
71279. The impact between two lead spheres is approximately equal to an __________ impact.
71280. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
71281. If a body is thrown upwards, then the gravitational acceleration is taken as zero.
71282. An ideal machine is one whose efficiency is
71283. The energy possessed by a body, for doing work by virtue of its position, is called
71284. Moment of inertia is the
71285. The coefficient of restitution for inelastic bodies is
71286. When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.
71287. The term 'centroid' is
71288. Two forces are acting at an angle of 120°. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is
71289. The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is
71290. In order to completely specify angular displacement by a vector, it must fix
71291. Which of the following statement is correct in connection with projectiles?
71292. The acceleration of a body sliding down an inclined surface is
71293. If surface area and volume of a sphere can be represented by the same number,then what is the length of the diameter of the sphere?
71294. The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is
71295. The unit of force in S.I. system of units is
71296. The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is
71297. A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
71298. A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act
71299. ELISA test is confirmatory for?
71300. The force induced in the string AB due to the load W, as shown in the below figure is