Ice is slippery when a man walks on it because
A.Its surface is smooth
B.There is no friction
C.It is very chill
D.Increase of pressure causes it to melt
E.Ice is brittle
Category: Applied Mechanics Mcqs
Which of the following could be the unit of rotational inertia of a body in CGS system?
A.gm-cm2
B.gm-cm4
C.cm4
D.kg-cm2
The moment of inertia of a solid sphere of radius r is
A.Mr2
B.1/2 Mr2
C.1/8 Mr2
D.2/3 Mr2
Plastic collosion of two bodies of equal mass results in a common velocity after impact which is
A.Sum of their initial velocities
B.Difference of their initial velocities
C.Average of their initial velocities
D.Independent of their initial velocities
E.None of the above
The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is
A.16.32 m/sec
B.8.16 m/sec
C.5.88 m/sec
D.8.88 m/sec
E.Zero
The moment of inertia of a semi-circle of radius r with respect to a centroidal axis parallel to the diameter is
A.0.055 r2
B.0.05 r2
C.0.11 r2
D.0.22 r2
E.0.33 r2
The torque acting on a system is zero. Which of the following will be conserved?
A.Linear momentum
B.Angular momentum
C.Moment of inertia
D.Angular velocity
The motion of a bicycle wheel is
A.Linear
B.Rotary
C.Translatory
D.Rotary as well as translatory
E.Curvilinear
