The motion of a particle moving with S.H.M. from an extremity to the other, constitutes
-
half an oscillation -
one full oscillation -
two oscillations -
none of these.
The frequency of oscillation on moon as compared to that on earth, will be
-
2.44 times more -
2.44 times less -
3 times less -
3 times more.
A train weighingtonnes experiences a frictional resistance of 
per tonne. The speed of the train at the top of a down gradient 1 in 78.4 iskm/hour. The speed of the train after running 1 km down the slope, is
-
510 m/sec -
105 m/sec -
53 m/sec -
35 m/sec.
A smooth cylinder lying on its convex surface remains
-
in stable equilibrium -
in unstable equilibrium -
in neutral equilibrium -
out of equilibrium -
none of these.
In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw iscm. The velocity ratio of the system is
-
1.5 -
5 -
25 -
314
The centre of gravity of a quadrant of a circle lies along its central radius at a distance of
-
0.2 R -
0.3 R -
0.4 R -
0.5 R -
0.6 R.
A particle moving with a simple harmonic motion, attains its maximum velocity when it passes
-
the extreme point of the oscillation -
through the mean position -
through a point at half amplitude -
none of these.
A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is
-
W sec θ -
W cos θ -
W sin θ -
W cosec θ -
W tan θ.
Two parallel forceskg andkg act. In order that the distance of the resultant fromkg force may be the same as that of the former resultant was fromkg, thekg force is diminished by
-
5.5 kg -
6.25 kg -
8.75 kg -
10.5 kg.
Kinetic friction may be defined as
-
friction force acting when the body is just about to move -
friction force acting when the body is in motion -
angle between normal reaction and resultant of normal reaction and limiting friction -
ratio of limiting friction and normal reaction.
Moment of interia of a squares of side fa about an axis through its centre of gravity, is
-
b3/4 -
b4/12 -
b4/3 -
b4/8 -
b4/36.
When a body falls freely under gravitational force, it possesses
-
maximum weight -
minimum weight -
no weight -
no effect on its weight.
To double the period of oscillation of a simple pendulum
-
the mass of its bob should be doubled -
the mass of its bob should be quadrupled -
its lenght should be quadrupled -
its length should be doubled.
When a body falls freely under gravitational force, it possesses
-
maximum weight -
minimum weight -
no weight -
no effect on its weight.
A geo-stationary satellite is one which orbits the earth with a velocity of rotation of
-
moon -
earth -
sun -
pole.
The motion of a bicycle wheel is
-
translatory -
rotary -
rotary and translatory -
curvilinear
Pick up the incorrect statement from the following. In a simple harmonic motion
-
velocity is maximum at its mean position -
velocity is minimum at the end of the storke -
acceleration is minimum at the end of the stroke -
acceleration is zero at the mean position.
A stone is whirled in a vertical circle, the tension in the string, is maximum
-
when the string is horizontal -
when the stone is at the highest position -
when the stone is at the lowest position -
at all the positions.
The rate of change of displacement of a body with respect to its surrounding, is known
-
velocity -
acceleration -
speed -
none of these.
A satellite goes on moving along its orbit round the earth due to
-
gravitational force -
centrifugal force -
centripital force -
none of these.
If a body is acted upon by a number of coplaner non-concurrent forces, it may
-
rotate about itself without moving -
move in any one direction -
move in any one direction rotating about itself -
be completely at rest -
all the above.
The velocity of a moving body, is
-
a vector quantity -
a scalar quantity -
a constant quantity -
none of these.
The motion of a bicycle wheel is
-
translatory -
rotary -
rotary and translatory -
curvilinear
A stone is whirled in a vertical circle, the tension in the string, is maximum
-
when the string is horizontal -
when the stone is at the highest position -
when the stone is at the lowest position -
at all the positions.
A rigid body suspended Vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called
-
simple pendulum -
compour pendulum -
Second's pendulum -
none of these.
For a particle moving with a simple harrmonic motion, the frequency is
-
directly proportional to periodic time -
inversely proportional to periodic time -
inversely proportional to its angular velocity -
directly proportional to its angular velocity -
none of these.
The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane
-
to be zero -
to be maximum -
to be minimum -
none of the these.
The following factor affects the orbit of a satellite up to an altitude ofkm from the earth's surface
-
uneven distribution of the gravitational field -
gravity of the sun and the moon -
aerodynamic forces -
none of these.
The unit of impulse, is
-
kg.m/sec -
kg.m/sec3 -
kg.m/sec2 -
kg.m2/sec.
The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of
-
8.04 km/sec at a height of 285 km -
11.11 km/sec at a height of 37, 400 km -
11.26 km/sec, the satellite escapes the pull of the earth -
all the above.