Related InterviewSolutions

• Moment of inertia of a body depends uponA. axis of rotationB. torqueC. angular momentum `D. angular velocity
• A particle of mass 1 kg is kept at (1m,1m,1m). The moment of inertia of this particle about Z-axis would beA. `1 "kg-m"^(2)`B. `2 "kg-m"^(2)`C. `3 "kg-m"^(2)`D. None of these
• Two identical rods each of mass M and length L are kept according to figure. Find the moment of inertia of rods about an axis passing through O and perpendicular to the plane of rods.
• Two uniform, thin identical rods each of mass M and length `l` are joined together to form a cross. What will be the moment of inertia of the cross about an axis passing through the point at which the two rods are joined and perpendicular to the plane of the cross ?A. `(Ml^(2))/(12)`B. `(Ml^(2))/(6)`C. `(Ml^(2))/(4)`D. `(ML^(2))/(3)`
• Assertion : The angular velocity of a rigid body in motion is defined for the whole body Reason : All points on a rigid body performing pure rotational motion are having same angular velocity.A. If both Assertion and Reason are correct and Reason is the correct explanation of AssertionB. If both Assertion and Reason are true but Reason is not the correct explanation of AssertionC. If Assertion is true but Reason is fasleD. If Assertion is false but Reason is true
• Circular disc of mass 2 kg and radius 1 m is rotating about an axis perpendicular to its plane and passing through its centre of mass with a rotational kinetic energy of 8 J. The angular momentum is (Js) isA. 8B. 4C. 2D. 1
• For the uniform T shaped structure, with mass 3M, moment of inertia about an axis normal to the plane and passing through O would be A. `(2)/(3)Ml^(2)`B. `Ml^(2)`C. `(Ml^(2))/(3)`D. None of these
• A 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 an angular velocity `omega` . Another disc of same dimensions but of mass `(1)/(4)` M is placed gently on the first disc co-axially. The angular velocity of the system isA. `(2)/(3) omega`B. `(4)/(5) omega`C. `(3)/(4) omega`D. `(1)/(3) omega`
• A particle P is moving in a circle of radius a with a uniform speed u, C is the centre of the circle and AB is a diameter. The angular velocities of P about A and C are in the ratioA. `1:1`B. `1:2`C. `2:1`D. `4:1`
• A sphere can roll on a surface inclined at an angle `theta`, if the friction coefficient `mu gt (2//7)g sin theta`. Now suppose the friction coefficient is `(1//7)g sin theta` and the sphere is released from rest on the incline, thenA. it will stay at restB. it will make pure translational motionC. it will translate and rotate about the centreD. the angular momentum of he sphere about its centre will remains constant