Physics question and answers for April 24, 2024
- Q When a disc rotates with uniform angular velocity which of the following is not true Rate of change a The sense of rotation remains same b The orientation of the...
- Q Three identical particles each of mass m are kept at the vertices of an equilateral triangle of side If the system rotates with a constant angular speed oo the energy...
- Q 38 A device Fig 1 26 consists of a smooth L shaped rod located in a horizontal plane and a sleeve A of mass m attached by a weight less...
- Q 33 A small mass attached to a string rotates on a frictionless table top as shown If the tension in the string is increased by pulling the string causing the...
- Q A circular ring of diameter 40 cm and mass 1 kg is rotat ing about an axis normal to its plane and passing through the centre with a frequency of...
- Q 3 A square plate of side 1 has mass M What is it moment of inertia about one of its diagonals M1 MI a b c 6 M1 3 d...
- Q 23 A cylinder is being pulled slowly with the help of a long uniform rope on a horizontal floor as shown in the figure The pulling force lying applied at...
- Q A uniform disc is rolling on a horizontal surface at a uniform speed of 3 rps The radius of the disc is 10 cm and its mass is 1 2...
- Q 48 The moment of inertia of a uniform semicircular disc of mass M and radius r about a line perpendicular to the plane of the disc through the centre is...
- Q The moment of a force of 25 N about a point is perpendicular distance of force Ans 10 cm 2 5 N m Find the from that point
- Q Mass of an electron is 9 x 10 31 kg It revolves round the nucleus of an atom in a circular orbit of radius 4 0 with a speed of...
- Q A non uniform bar of weight W is suspended at rest by two strings of negligible weight as shown in Fig 1 68 The angles made by the strings with...
- Q 8 A wire has resistance 12 ohm It is bent in the form of a circle The effective resistance betwee the two points on any diameter of the circle is...
- Q 8 Two rods each of mass m and length are joined at the centre to form a cross The moment of inertia of this cross about an axis passing through...
- Q A uniform thin circular ring of mass m m 0 4 kg and radius r has a small particle of the same mass m fixed on it as shown in...
- Q A uniform disc of mass m and radius R is thrown on horizontal lawn in such a way that it initially slides with speed Vo without rolling The distance travelled...
- Q A uniform rod of mass m and length starts rotating with constant angular acceleration a de constant couple in a horizontal plane about a fixed vertical axis passing through one...
- Q In a merry go round a boy of mass 20 kg is revolving along a circular path of radius 10 m with an angular velocity of 6 rpm What is...
- Q A large platform is moving with constant acceleration a perpendicular to its plane in gravity free space A particle of mass m is projected with speed u relative to the...
- Q Figure shows a thin rod mass M length L suspended in a vertical plane by tying ideal strings at ends A and B Initially rod makes an angle 30 with...
- Q A flat disc of radius R lies on the horizontal surface The pressure between the disc and the surface decreases linearly with distance from the centre r due to its...
- Q Consider a thin uniform square sheet made of a rigid material If its side is a mass m and moment of inertia I about one of its diagonals then 1...
- Q The moment of inertia of semicircular ring about an axis which is perpendicular to the plane of the ring and passes through the centre AIEEE 2002 a MR2 c MR2...
- Q A wheel has a constant angular acceleration of 3 0 rad s2 During a certain 4 0 s interval it turns through an angle of 120 rad Assuming that at...
- Q Two thin circular discs of mass 2 kg and radius 10 cm each are joined by a rigid massless rod of length 20 cm The axis of the rod is...
- Q A disc of mass M and radius R has massless string wrapped over it with one end fixed on disc and other end connected to block of same mass M...
- Q Calculate the radius of gyration of a uniform thin rod of mass M and length L about an axis of rotation perpen dicular to its length and passing through its...
- Q A stick of mass density 8 kg m rests on a disc of radius R 20 cm as shown in the figure The stick makes an angle 0 37 with...
- Q A uniform rod AB bent in the shape of an arc of circle is free to rotate in a vertical plane about a fixed horizontal axis passing through the mid...
- Q 2 A bullet of mass 0 02 kg is travelling with speed 100 m s at an angle of 30 with respect to the horizontal The bullet collides with and...
- Q s 69 3 hrs number of to t 11 gases itself mass en its K AIIMS 2019 A rod starts slipping from rest on the smooth surface with its initial...
- Q A uniform wire frame of linear mass density having of length 2a is kept on a smooth horizontal surface An impulse J is applied at one end as shown in...
- Q 4 A wheel of radius R and mass M is placed at the bottom of a fixed step of heig shown in the figure A constant force is continuously applied...
- Q clinder of height h is placed on an inclined x 10 x 1 5 x 10 t plane the angle of inclination of which is slowly increased It begins to...
- Q about A rod lying on a frictionless horizontal is initially given an angular velocity vertical axis which passes through centre of mass The centre of mass is at rest but...
- Q Two particles A and B of mass m each are connected together by a rigid massless rod of length 20 cm Initially rod is vertical and particle A is given...
- Q A and B are two loops made from same wire The radii of A and B are r and r and their moment of inertia about same axes are 1...
- Q A disc of mass M and radius R is placed on a rough horizontal surface A light rod of length 2R is fixed to the disc at point A as...
- Q 145 A closed chain A of mass m 0 36 kg is attached to a vertical rotating shaft by means of a thread Fig 1 37 and rotates with a...
- Q 10 In the setup shown the string is inextensible and light there is friction at the axles of the pulleys but friction between the string a the pulley wheels is...
- Q 1 A 60 kg mass is spun in a circle of radius 10 m with a velocity of 100 m s a What is the frequency of rotation if the...
- Q A bicycle is moving with constant acceleration The frictional force on rear wheel is 2 In forward direction 1 Zero 3 Backward direction 4 All of these
- Q 31 Three point masses each of mass m are connected by 3 light rigid rod and system is rotating about one rod as shown in the given figure Moment of...
- Q A wire frame AOPQB lying in the horizontal plane is free to rotate about a vertical axis passing through center C of the same circle and I to plane of...
- Q CRP 1819 JEEA RP PI PH 4 20 A uniform cylinder of mass m and radius r rolls on a fixed cylindrical surface of radius R At a certain instant...
- Q Find radius gyration about axis shown in figure Solid Hemisphere IC 1 0 67R 3 1 4R 2 0 4R 4 1 33R
- Q A boy and a man carry a uniform rod of leng horizontally in such a way that the boy gets of the load If the boy is at one end...
- Q 15 Moment of inertia of the sector of mass m and radius R about axis through centre of curvature and normal to plane is 1 2 3MR2 4 MR 1200...
- Q Numericals 1 A nut can be opened by lever of length 20 cm If the minimum force required is 4 N calculate the moment of force to turn the nut...
- Q 46 When a body is rolling without slipping on a rough horizontal surface the work done by friction is 1 Always zero 2 May be zero 3 Always positive 4...
- Q is zero An electron of kinetic energy of 7 2 x 10 18 J is revolving on circular path in magnetic field 9 x 10 5 Wb m 2 then...
- Q 12 The ratio of rotational kinetic energy to the to kinetic energy of a disc in pure rolling motion is 1 2 1 2 3 3 2 13 4 1
- Q Moment of inertia of a disc about OO is of A 3 mr 2 B mr 2 m C 5 mr2 2 D 5 mr 4
- Q JEFE A uniform wooden plank of mass 30 kg is kept on two supports plank is L g as shown The length of the Reaction force applied by Y as...
- Q A rod of mass m length 100 cm is hanging as show in diagram A block of mass 2m is hanged from on end at distance 25 cm Find tension...
- Q 31 Find the acceleration of the body if a force F 8N pulls the string at P that passes over the body and it is 2 connected by another string...
- Q 9 8 A disc of moment of inertia kg m is rotating at 600 rpm If the frequency of rotation the work done changes from 600 rpm to 300 rpm...
- Q Two rings equal thickness of radius R and n made up of same material have the moment o inertia about an axis passing through centre as 1 8 The value...
- Q A rod of mass 100 g and length 1 0 m makes an angle 30 with the axis passing through its centre Find i the moment of inertia of the...
- Q A circular ring of mass 20 g is rotating about its own axis with an angular velocity of 30 rpm Two bodies of equal masses are placed simultaneously at the...
- Q 4 The magnitude of the resultant moment about point O in Nm of the two forces acting on the rod shown below is A 25 B 125 college 0 5...
- Q By keeping moment of inertia of a body constant if we double the time period then angular momentum of body A remains constant C doubles B becomes half D quadruples
- Q 3 A metre stick is pivoted about its centre A piece of wax of mass 20 g travelling horizontally and perpendicular to it at 5 m s strikes and adheres...
- Q are joined together by a Three identical particle thread as shown All the three particles are moving in a horizontal plane If the velocity of the outermost particle is vo...
- Q The moment of inertia of a square lamina about the perpendicular axis through its centre of mass is 20 kg m Then its moment of inertia about an axis touching...
- Q 0 A couple produces 1 Linear and rotational motion 2 No motion 3 Purely linear motion LAX Ruroly rotational motion
- Q A cubical block of mass m and edge a slides down a rough inclined plane of inclination e with uniform velocity Find the torque of the normal force acting on...
- Q A ring of mass m 1 kg and radius R 125m is kept on a rough horizontal ground A small body of same mass m 1kg is struck to the...
- Q A small body of mass m is attached to a light thread which passes through a hole at the centre of a smooth table The body is set into rotation...
- Q A rope is wound on a circular disc of moment of inertia 0 1 kg m A tangential force of 20 N on the rope rotates the disc about its...
- Q 2 Two discs are rotating about their axes normal to the discs and passing through the centres of the discs Disc D has 2 kg mass and 0 2 m...
- Q 37 A thin wire of length and uniform linear mass density p is bent in the form of a square Its moment of inertia about an axis along one of...
- Q 27 The initial angular acceleration of the uniform rod of length just after the string A is cut as shown in the figure is hickA 1 3 4g 3L 12g...
- Q m and radius R is made to move on a horizontal floor with a horizontal velocity vo in such a way that at the time t 0 its motion is...
- Q Moment of inertia of a wheel is 0 04 kg m If its number of revolutions is increased from 60 rpm to 150 rpm in 3 s determine the magnitude...
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