Class Test no 1

1. Moment of inertia of a particle is

• I = mr²

• I= mr

• I=m²r

• I=m² r²

2. SI unit of moment of inertia is

• Kgm

• Kgm²

• Kg²m²

• none of the above

The force of gravity acting on various particles of a rigid body can be represented by a single force which is the weight of the body (Mg) acting at a point. This point is called

• Angular Velocity

• acceleration

• Centre of force

• Centre of gravity

Radius of gyration is represented as

• I=mk²

• K²= I/m

• both A and B is correct

• None of the above

Parallel axis theorem for moment of Inertia is

• I = I_G +Ma²

• I= I_G- Ma

• I= Ma²

• none of the above

Expression for moment of inertia of a circular disc about an axis passing through its centre and perpendicular to its plane

• 4/2 MR²

• 5/2MR²

• 3/2 MR²

• ½ MR²

Expression for Total kinetic energy of a rolling disc

• E_rot= 2/4 Mv²

• E_rot = ½ Mv²

• A) Erot = ¾ mv²

• None of the above

Expression for Angular momentum

• L= Pw

• L = Iw

• L= Nw

• None of the above

Expression for Torque

• Torque = Force x Perpendicular Distance

• Torque = Force/ Perpendicular Distance

• Torque = Force – Perpendicular Distance

• none of the above

In torque =I alpha , alpha denotes

• Angular Velocity

• Angular Displacement

• Angular Momentum

• Angular Acceleration.