Physics question and answers for April 28, 2024
- Q 74 A uniform solid cylinder of mass 5 kg and radius 0 1 m is resting on a horizontal platform parallel to the x y plane and is free to...
- Q A disc is made to rotate about a horizontal fixed axis with the help of a body of mass 5kg attached to a string wound around the disc The radius...
- Q 73 A disc of radius R is rolling purely on a flat horizontal surface with constant angular velocity The angle between the velocity and acceleration vectors of point Pis P...
- Q View In English In the following figure the velocities are in ground frame and the cylinder is performing pure rolling on the plank velocity of point A would be 3...
- Q A stone of mass m 1 0kg is suspended from the free end of a wire that is wrapped around the outer rim of a pulley similar to what is...
- Q 2 1 Two spheres are moving as shown in figure They are given initial velocity is such that they are just able co touch each other during subsequent motion Then...
- Q A square plate has a moment of inertia I about an axis lying in the plane passing through its cente and making an angle 8 with one of the sides...
- Q 30 What is the applied centrifugal field at a point equivalent to 5 cm from the centre of a rotation and an angular velocity of 3000 rads second O 45000...
- Q A ring and a disc roll on the horizontal surface without slipping with same linear velocity If both have same mass and total kinetic energy of the ring is 4...
- Q 19 A metallic wire is folded to form a square loop of side a It carries a current i and is kept perpendicular to a uniform magnetic field If the...
- Q only one force which always acts towards a fixed point O lying on the circumference Find ratio of 2 d 0 dt at the moment when 0 45 C is...
- Q A solid cylinder has mass M radius R and length e Its moment of inertia about an axis assing through its centre and perpendicular to its own axis is 2MR2...
- Q A disc of radius R and thickness centre and perpendicular to its plane Disc is melted and recast into a solid sphere The momen of inertia of a sphere about...
- Q A point object of mass m is slipping down on a smooth hemispherical body of mass M and radius R The point object is tied to a wall by an...
- Q A rod PQ of mass M and length L is hinged at end P The rod is kepts horizontal by a massless tring tied to point Q as shown in...
- Q A simplified gear system for mechanical watch is shown knowing that gear A starts from rest with an angular acceleration Aa 6 5t rad s 2 determine the angular velocity...
- Q A thin wire of length L and uniform linear mass density p is bent into a circular loop with centre O as shown The moment of inertia of the loop...
- Q a 4 414 A particle tied to a string of negligible weight and length lis velocity having time period T If the string length is swung in a horizontal circular...
- Q 71 A block of mass M length L and height H is kept at rest on a rough inclined plane of inclination a with the horizontal as shown If u...
- Q A uniform rod of mass m and length L is kept L 4 on a horizontal table with length on the table as shown in figure As the string attached...
- Q A semicircular lamina of mass m has radius r and centre C Its moment of inertia about an axis through its centre of mass and perpendicular to its plane is...
- Q A cylinder of mass m and radius R starts falling under gravity at t 0 as shown in figure If mass of chord is negligible the tension in each string...
- Q The position of a particle is given by r 1 2j k and momentum p 31 41 2k The angular momentum is perpendicular to Question Type Single Correct Type 1...
- Q A uniform rod AB bent in the shape of an arc of circle radius 2m is free to rotate in a vertical plane about a fixed horizontal axis passing through...
- Q 2 A circular disc of radius of gyration 20 cm at rest is dropped over another disc of same mass but double the radius of gyration rotating with 5 rad...
- Q A hollow sphere of mass m rolls without slipping down an inclined plane making an angle 8 with horizontal The frictional force between the hollow sphere and the inclined is...
- Q The diagram shows a hemispherical shell of mass m and radius R is hinged at point O placed on a horizontal surface A ball of mass m strikes the shell...
- Q View In English A hollow hemi sphere of mass m and radius r is released from rest in the position shown Knowing that the hemi sphere rolls without sliding Determine...
- Q EXAMPLE 31 A metre scale AB is held vertically with its one end A on the floor and then allowed to fall Find the speed of the other end B...
- Q EXAMPLE 23 Calculate the moment of inertia of a system of masses about the axis AB passing through the mid point of the base of triangle OR The masses m...
- Q 1 A football of radius R is kept on a hole of radius r r R made on a plank kept horizontally One end of the plank is now lifted...
- Q A cardboard strip is folded in shape such that the parallel sections are U rectangles of length 37 and breadth 2 and the third section is square face of side...
- Q An L shaped rod OAB is being rotated by a constant angular velocity o in a vertical plane about O There is a ring of mass m that can slide...
- Q 7 A string is wrapped around a cylinder of mass m and radius R The string is pulled vertically upwards to prevent the centre of mass from falling as the...
- Q A bar AB hinged to the foundation at A and supported by a strut CD is subjected to a horizontal force of 50 kN at B as shown in the...
- Q A cylinder of mass m is kept on a inclined plane having angle of inclination 30 Axis of cylinder makes an angle 30 with line along greatest slope Assuming that...
- Q From a disc of radius R a concentric circular portion of radius r is cut out so as to leave an annular disc of mass M The moment of inertia...
- Q A disc is rotating about an axis through its centre of mass normal to its plane with uniform angular velocity o If another identical disc is coupled parallel to the...
- Q A uniform circular ring of radius R mass m has uniformly distributed charge q The ring is constrained to rotate about its own axis which is vertical without friction In...
- Q A horizontal disc of mass 1 0 kg mounted on a fixed vertical axle through its centre can rotate without friction On the disc a semicircular groove OP is cut...
- Q The object shown in the figure below consists of a thin rod of length 22 8 cm and mass m 1 20 kg with a solid ball of diameter d...
- Q Two spheres of equal masses one of which is a thin spherical shell and the other a solid E the same moment of inertia about their respective diameters The ratio...
- Q Moment of inertia of a disc about an axis which is tangent and parallel to its plane is I Then th moment of inertia of disc about a tangent but...
- Q The moments of inertia of two freely rotating bodies A and B are IA and Ig respectively A IB and their angular momenta are equal If K and Ka are...
- Q Find the moment of inertia of a section of circular disc of radius R about an axis perpendicular to its plane as shown in the figure The section has mass...
- Q 2 A disc placed on a frictionless horizontal plank is rotating with a constant angular velocity about its central vertical axis Now the plank is made to move with a...
- Q Two wooden discs one with radius 2cm and mass 1kg and the other with radius 4cm and mass 2kg are welded together coaxially and mounted on a frictionless axis through...
- Q A constant force acting at the centre of a uniform disc of radius r is always perpendicular to the plane of the disc The disc can rotate about a chord...
- Q Which of the following facts about the complex Cr NH3 Cl is wrong 1 The complex is an outer orbital complex 2 The complex gives white precipitate with silver nitrate...
- Q Two circular loops A and B of radii R and 2R respectively are made of the similar wire Their moments of inertia about the axis passing through the centre of...
- Q Q5 Two cylinders A and B weighing 100 N and 200 N respectively are connected by a rigid rod curved parallel to the smooth cylindrical surface shown in Fig Determine...
- Q n the figure is shown a pulley block system in which block of mass M s hanging on one side of pulley and on the other side a particle P...
- Q Moment of inertia of a sphere about its diameter is MR2 What is its moment of inertia about an axis perpendicular to point of intersection of two diameters Question Type...
- Q A sphere of mass m is given some angular velocity about a horizontal axis through the center and gently placed on a plank of mass m The coefficient of friction...
- Q c Both will reach at the same time d None of the above 24 A solid cylinder rolls down an inclined plane of height 3 m and reaches the bottom...
- Q A uniform semi circular ring of radius R 5m and mass m is free to rotate in vertical plane about fixed horizontal axis passing through A as shown in the...
- Q The system in the figure is in equilibrium A concrete block of mass 228 kg hangs from the end of the uniform strut of mass 40 6 kg For angles...
- Q Hence proved Ex 7 A heavy particle slides under gravity down the inside of a smooth circular tube held in the vertical plane It starts from the highest point with...
- Q r 11 e the water level comes up to a height of 6 cm What will be the height of the centre of gravity of the cylinder containing 15 cm...
- Q Starting from rest a particle rotates in a circle of radius R 2m with an T angular acceleration a rad s The 4 magnitude of a average velocity of the...
- Q Illustration 2 30 The top in the figure has a moment of inertia equal to 4 00 10 kgm and is initially at rest It is free to rotate about...
- Q Q3 What are the necessary conditions for equilibrium of the object shown in Figure If F 10N F 15N F 5N and 1 1m Find the angle 8 which makes...
- Q length a is kept on a rough horizontal surface A horizontal force P is acting on the block as shown in the figure If the block is neither sliding nor...
- Q Que 16 A string is wound around a hollow cylinder of mass 5 kg and radius 0 5 m If the string is now pulled with a horizontal force of...
- Q A uniform thin stick of length and mass m is held horizontally with its end B hinged at a point B on the edge of a table Point A is...
- Q 5 A coin runs on a horizontal plane without slipping What fraction of total energy K E is rotational Answer all questions Each carries 4 mark 6 A rotational K...
- Q Que 10 The arrangement shows a solid cylinder of radius R placed between two planks There is no slipping at rough surfaces The planks are given a horizontal constant velocity...
- Q A uniform rod AB of length L and mass M is lying on a smooth table A small particle of mass m strikes the rod with velocity V at point...
- Q 100 Which of the following statements is not correct a During rolling the instantaneous speed of point of contact is zero 6 b During rolling the instantaneous acceleration of the...
- Q Which of the following is true about t angluar momentum of a cylinder rolling down slope without slipping 1 Its magnitude changes but the directic remains same 2 both magnitude...
- Q A disc of radius a and mass m rests between two light rods which are smoothly hinged together at point O with their ends A and B resting on a...
- Q A uniform solid sphere is rolling without slipping along a horizontal surface with a speed of 6 50 m s when it starts up a ramp that makes an angle...
- Q The disc is at rest at the top of a rough inclined plane It rolls without slipping At the bottom of inclined plane there is a vertical groove if radius...
- Q is under pure rolling on a rough horizontal surface If the velocity of its center of mass is 10 m s Then its angular momentum about origin O will be...
- Q force figure Then the ratio of linear acceleration and and the angular accelertion of the rod will be 1 2 1 3 4F 3m 3L 4 2F 3m L 6...
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