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Consider a disc rotating in the horizontal plane with a constant angular speed about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side a shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) remains constant throughout. Then - jee main 2012 physics 1 AnswerA uniform circular disc of mass π and radius π is rotating with angular speed π about an axis passing through its center and making an angle π=30β with the axis of the disc. If the kinetic energy of the disc is πΌππ2π 2, the value of πΌ is ________ (up to 2 decimal places).0 AnswerA force of 100 N is applied to the centre of a circular disc, of mass 10 kg and radius 1 m, resting on a floor as shown in the figure. If the disc rolls without slipping on the floor, the linear acceleration (in m/s2) of the centre of the disc is ________ (correct to two decimal places).0 AnswerAn annular disc has a mass m, inner radius R and outer radius 2R. The disc rolls on a flat surface without slipping. If the velocity of the centre of mass is v, the kinetic energy of the disc is: (-Gate mechanical 2014)1 AnswerA tractor PTO operated 4-disc rotary mower is harvesting with a forward speed of 3.5 km h^-1. The cutting circle diameter and rpm of each disc are 60 cm and 1400, respectively. The peak cutting force experienced by each rotary disc is 110 N. The peak1 AnswerA flywheel in the form of a solid circular disc of radius 100 mm and uniform thickness has a mass of 10 kg. If it is rotating at a uniform angular velocity of 20 rad/s, the kinetic energy (in J) of the flywheel is _______0 AnswerTwo identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed . The discs are in the same horizontal plane. At time t = 0, the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is vr . In one time period (T) of rotation of the discs, vr as a function of time is best represented by - jee main 20121 AnswerA circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is -Mechanical Engineering-gate-20121 AnswerMinimum Test Required for Statement Coverage1 AnswerA box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime-number less than 23, is: Mathematics CBSE class 10 20131 AnswerWhat is disc scheduling algorithm?1 AnswerThe rear furrow wheel in a tractor mounted disc plough is provided to. GATE- Agricultural1 AnswerWhich special type of Sunk key looks like a segment of a circular disc ? (a) Woodruff key (b) Feather key (c) Gib head key (d) Rectangular taper key (ENGG-GRAPHICS-CBSE-12-2018)1 AnswerFor an incompressible flow through a pipe of constant diameter in the fully developed region the mean velocity ios constant. What about the mean velocity in developing region?2 AnswerFor steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?1 AnswerThe change in reaction on rear wheels of the tractor due to pull in kN is (GATE-Agricultural-Engineering-2018)0 AnswerThree semicircles each of diameter 3 cm, a circle of diameter 4.5 cm and a semicircle of radius 4.5 cm are drawn in the given figure. Find the area of the shaded region. Mathematics CBSE class 10 20171 AnswerA hoop of radius r and mass m rotating with an angular velocity Ο0 is placed on a rough horizontal surface. The initial velocity of the centre of the hoop is zero. What will be the velocity of the centre of the hoop when it ceases to slip ? - physics 20131 AnswerIn the given figure, O is centre of the circle with AC = 24 cm, AB = 7 cm and β BOD = 90Β°. Find the area of the shaded region. Mathematics CBSE class 10 20171 AnswerConsider an electric field E = E0 * X, where E0 is a constant. The flux through the shaded area (as shown in the figure) due to this field is - jee main 2012 physics 1 Answer
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