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Special Class Railway Apprentices (SCRA) Examination Question Paper

A particle in uniform circular motioncan possess
(a) radial acceleration only
(b) tangential acceleration only
(c) both radial and tangential acceleration
(d) neither radial nor tangential acceleration

The frictional force on a rolling cylinderis proportional to
(a) the tangential force and directedperpendicular to the surfaces incontact
(b) the tangential force and directedparallel to the surfaces in contact
(c) the normal force and directedparallel to the surfaces in contact
(d) the normal force and directedperpendicular to the surfaces incontact

A pendulum consisting of a small sphereof mass m, suspended by an inextensibleand massless string of length Lis made toswing in a vertical plane. If the breakingstrength of the string is 2 mg where g isthe acceleration due to gravity,• then themaximum angular amplitude of the displacementfrom the vertical can be
(a) 15°
(b) 30°
(c) 60o
(d) 75°

A planet moves round tlie Sun in acircular orbit. The angular velocity ofplanet will be proportional to
(a) velocity of planet
(b) square of velocity of planet
(c) cube of velocity of planet
(d) None of the above

Consider the following statements inrespect of a plane progressive wave :
1. All the particles of the mediumvibrate in same phase at any instantof time.
2. All the particles of the mediumexecute simple harmonic motion.
3. The wave velocity depends uponthe nature of the medium.
Which of the above statements arecorrect?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Special Class Railway Apprentices (SCRA) Examination Question Paper

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