All India Engineering / Architecture Entrance Examination (AIEEE)

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AIEEE 2007 Physics

Q. 33. A round uniform body of radius R, mass M and moment of inertia I rolls down (without slipping) an inclined plane making an angle with the horizontal. Then its acceleration is

Sol:

Correct choice: (1)

Q. 34. Angular momentum of the particle rotating with a central force is constant due to

1. constant force
2. constant linear momentum
3. zero torque
4. constant torque

Sol: Central force is directed towards a point, therefore torque of the central force is zero. Correct choice: (3)

Q. 35. s A 2 kg block slides on a horizontal floor with a speed of 4 m/s. It strikes a uncompressed spring, and compresses it till the block is motionless. The kinetic friction force is 15 N and spring constant is 10,000 N/m. The spring compresses by

1. 5.5 cm
2. 2.5 cm
3. 11.0 cm
4. 8.5 cm

Sol:

Correct choice: (1)

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