Machine Kinematics Multiple Choice Questions and Answers – Acceleration of a Particle along a Circular Path

Questions
1 A wheel accelerates uniformly from rest to 2000 r.p.m. in 20 seconds. What is its angular acceleration?
A 10.475 rad/s2
B 12 rad/s2
C 14 rad/s2
D 15 rad/s2

Answer: 10.475 rad/s2
2 A wheel accelerates uniformly from rest to 2000 r.p.m. in 20 seconds. How many revolutions does the wheel make in attaining the speed of 2000 r.p.m.?
A 400
B 300
C 333.4
D 200

Answer: 333.4
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3 The acceleration of a particle at any instant moving along a circular path in a direction tangential to that instant, is known
A tangential component
B normal component
C parallel component
D none of the mentioned

Answer: tangential component
4 The acceleration of a particle at any instant moving along a circular path in a direction normal to the tangent at that instant and directed towards the centre of the circular path, is known as
A tangential component
B normal component
C parallel component
D none of the mentioned

Answer: normal component
5 When a particle moves along a straight path, then the radius of curvature is
A infinitely small
B zero
C infinitely great
D none of the mentioned

Answer: infinitely great
6 When a particle moves with a uniform velocity, then dv/dt will be
A infinitely small
B zero
C infinitely great
D none of the mentioned

Answer: zero
7 A horizontal bar 1.5 metres long and of small cross-section rotates about vertical axis through one end. It accelerates uniformly from 1200 r.p.m. to 1500 r.p.m. in an interval of 5 seconds. What is the linear velocity at the beginning of the interval ?
A 188.6 m/s
B 235.5 m/s
C 300 m/s
D 400 m/s

Answer: 188.6 m/s
8 A horizontal bar 1.5 metres long and of small cross-section rotates about vertical axis through one end. It accelerates uniformly from 1200 r.p.m. to 1500 r.p.m. in an interval of 5 seconds. What is the linear velocity at end of the interval ?
A 188.6 m/s
B 235.5 m/s
C 300 m/s
D 400 m/s

Answer: 235.5 m/s

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