16: virtual displacement depend upon
a) Coordinates
b) Time
c) Both a & b
d) None
17: Routh’s procedure deals with
a) Polar coordinates
b) Generalized coordinates
c) Cyclic coordinates
d) Buss
18: If direction of ‘F’ and ‘r’ is reversed then torque is
a) Also changed
b) Remains unchanged
c) Magnitude changes
d) None of these
19: the relativistic mechanics give the same results as classical mechanics except
a) When the bodies treated at a speed approaching a speed of light
b) When applied to atomic of the system
c) None of these
20: non conservative forces have
a) Velocity
b) Coordinates
c) Both a & b
d) None of these
21: constraint that can be express in term of coordinates and time f( r1, r2,r3,…..,t)=0 are said to be
a) Holonomic
b) Non Holonomic
c) Scleronomous
d) Rheonomous
22: Rheonomous constraints have
a) Explicit time dependence
b) not Explicit time dependence
c) both Explicit time dependence
d) neither Explicit time dependence nor no Explicit time dependence
23: Scleronomous constraint have
a) Explicit time dependence
b) not Explicit time dependence
c) both Explicit time dependence
d) neither Explicit time dependence nor no Explicit time dependence
24: if the lagrangians is cyclic in qj then
a) Pj is not conserved
b) Pj is conserved
c) qj appears in lagrangians
d) The lagrangians is circular
25: when no force acting on a particle then
a) P is conserved
b) P is not conserved
c) P is zero
d) None of these
26: when a conservative force does negative work on a body the P.E of the body
a) Decrease
b) Increase
c) Remain the same
d) Decreases when force is small and increases when force is decreases
27: which of the following does not have a linear momentum?
a) An airplane at 30,000 ft
b) A neutrino
c) A speeding bullet
d) All of these
28: second law of motion describes
a) Force
b) Momentum
c) Acceleration
d) Both a & b
29: if P is the momentum of an object of mass m the expression P2
/2m has base units
identical to
a) Energy
b) Force
c) Power
d) Velocity
