Physics question and answers for April 28, 2024
- Q 12 Assertion As wind flows left to right and a ball is spinned as shown there will be a lift of the ball Reason Decrease in velocity of air below...
- Q A circular disc of radius a with surface density of mass o Kr is under pure rolling on a rough horizontal surface such that the velocity of its center of...
- Q A uniform thin cylindrical disk of mass M and radius R is attached to two identical massless springs of spring constant k which are fixed to the wall as shown...
- Q A machine of 250 kg mass is supported on springs of total stiffness 100 kN m Machine has an unbalanced rotating force of 350 N at speed of 3600 rpm...
- Q r 2m is accelerating on a rough horizontal surface having coefficient of friction 0 2 Then the acceleration of its center of mass when a force of 45N is applied...
- Q Two discs are in contact with each other The axis of both the discs has been fixed They can only rotate A force F has been applied tangentially on larger...
- Q 30 A metal sphere of radius r and specific heat S is rotated about an axis passing through its centre at a speed of f second It is suddenly stopped...
- Q motor delivers constant power P to a cylinder of mass m and radius r which is free to rotate about it axis then the torque acting on the cylinder as...
- Q uniform boards tied together with the help of string are balanced on a surface as shown in the figure The coefficient of static friction between boards and surface is 0...
- Q A wheel of radius 20 cm and moment of inertia 1 kgm can rotate about its centre A string is wrapped over its rim and is pulled by a force...
- Q Two masses of 5 kg and 10 kg are connected to a pulley as shown What will be the acceleration of the system g acceleration due to gravity 1 q...
- Q 17 Which of the following statements is correct a For a general translation motion momentum P and velocity need not parallel b For a general rotational motion angular momentum I...
- Q A uniform circular ring of mass m and radius R is placed freely on a horizontal smooth surface as shown in figure A particle of mass m is connected to...
- Q A solid sphere of mass m radius r undergo pure rolling inside a fixed vertical stationar circular track of radius R The sphere just completes vertical circle The normal at...
- Q If the radius of a cylinder rotating about its axis is changing with time as R at such that its angular velocity o remains constant then the torque acting on...
- Q A rod AB of length L and mass M is free to move on a frictionless horizontal surface It is moving with a velocity v as shown in figure End...
- Q are Two identical billiard balls of diameter 5 cm each moving with a speed of 3 m s roll without slipping towards each other on a horizontal rectangular U shaped...
- Q As shown in the figure there are three masses m 2m and 3m kept at the vertices of an isosceles triangle Equal sides have length 1 1m and third side...
- Q QA thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with...
- Q QA uniform rod of length L is free to rotat in a vertical plane about a fixed horizontal axis through O The rod is allowed to rotate from its unstable...
- Q Answer all questions Each carries 4 mark 5 A rotational K E of a particle rotating about a certain axis is 16J Calculat the angular moment of the particle about...
- Q M I about its axis of rotation is 2 Kg m 2 7 Calculate the MI of a cylinder of length 2 m radius 5 cm and density 8 x...
- Q A dise weight W 100N and radius r 0 25 m supported at it acted up on by a constant couple of moment 6 Nm and a force of 50...
- Q At a point beats frequency of n Hz is observed It means 1 medium particles at that point are vibrating with frequency n Hz 2 amplitude of vibrations changes simple...
- Q a The diagram given below shows a uniform meter rule of weight 100 gf being balanced c a knife edge placed at the 40 cm mark by suspending a weight...
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