Q.1
If two bodies having masses m1 and m2 (m1>mhave equal kinetic energies, the momentum of body having mass m1 is _________ the momentum of body having mass m2.
  • Equal to
  • Less than
  • Greater than
  • None of these
Q.2
A circular hole ofmm diameter is cut out from a circular disc ofmm diameter as shown in the below figure. The center of gravity of the section will lie
  • In the shaded area
  • In the hole
  • At ‘O’
  • None of these
Q.3
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is
  • db³/12
  • bd³/12
  • db³/36
  • bd³/36
Q.4
The C.G. of a right circular solid cone of height h lies at the following distance from the base
  • h/2
  • J/3
  • h/6
  • h/4
Q.5
If a number of forces are acting at a point, their resultant is given by
  • (∑V)2 + (∑H)2
  • √[(∑V)2 + (∑H)2]
  • (∑V)2 +(∑H)2 +2(∑V)(∑H)
  • √[(∑V)2 +(∑H)2 +2(∑V)(∑H)]
Q.6
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve
  • Circular arc
  • Parabola
  • Hyperbola
  • Elliptical
Q.7
Two like parallel forces are acting at a distance ofmm apart and their resultant isN. It the line of action of the resultant is 6 mm from any given force, the two forces are
  • 15 N and 5 N
  • 20 N and 5 N
  • 15 N and 15 N
  • none of these
Q.8
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force.
  • Agree
  • Disagree
Q.9
Work done is said to be zero, when
  • some force acts on a body, but displacement is zero
  • no force acts on a body but some displacement takes place
  • either (a) or (b)
  • none of the above
Q.10
If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.
  • Agree
  • Disagree
Q.11
When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
  • simple pendulum
  • compound pendulum
  • torsional pendulum
  • second's pendulum
Q.12
A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
  • True
  • False
Q.13
A redundant frame is also called __________ frame.
  • perfect
  • imperfect
  • deficient
Q.14
The path of the projectile is a parabola.
  • True
  • False
Q.15
The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.
  • True
  • False
Q.16
The centre of gravity of an equilateral triangle with each side a, is __________ from any of the three sides.
  • 3a/2
  • 23a
  • a/23
  • 32a
Q.17
The distance, between the point of projection and the point where the projectile strikes the ground, is known as range.
  • Correct
  • Incorrect
Q.18
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
  • static friction
  • dynamic friction
  • limiting friction
  • coefficient of friction
Q.19
The bodies which rebound after impact are called
  • inelastic bodies
  • elastic bodies
  • neither elastic nor inelastic bodies
  • none of these
Q.20
Static friction is always __________ dynamic friction.
  • equal to
  • less than
  • greater than
  • None of these
Q.21
When a particle moves along a circular path with uniform velocity, there will be no tangential acceleration.
  • Correct
  • Incorrect
Q.22
The range of a projectile is maximum, when the angle of projection is
  • 30°
  • 45°
  • 60°
  • 90°
Q.23
The frequency of oscillation of a torsional pendulum is
  • 2πk/r. √(g/l)
  • r/2πk. √(l/g)
  • 2πr/k. √(g/l)
  • r/2πk. √(g/l)
Q.24
The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.
  • Yes
  • No
Q.25
If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that
  • tan θ = ∑H/∑V
  • tan θ = ∑V/∑H
  • tan θ = ∑Vx∑H
  • None of these
Q.26
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is
  • bh3/4
  • bh3/8
  • bh3/12
  • bh3/36
Q.27
The unit of angular acceleration is
  • N-m
  • m/s
  • m/s2
  • rad/s2
Q.28
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)
  • t = g cos β/2u sin (α - β)
  • t = 2u sin (α - β)/g cos β
  • t = g cos β/2u sin (α + β)
  • t = 2u sin (α + β)/g cos β
Q.29
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.
  • Yes
  • No
Q.30
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
  • 30°
  • 60°
  • 90°
  • 120°
Q.31
A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)
  • P = W tanα
  • P = W tan(α + φ)
  • P = W (sinα + μcosα)
  • P = W (cosα + μsinα)
Q.32
The range of projectile on a downward inclined plane is __________ the range on upward inclined plane for the same velocity of projection and angle of projection.
  • less than
  • more than
  • equal to
  • None of these
Q.33
The angle of inclination of a vehicle when moving along a circular path __________ upon its mass.
  • depends
  • does not depend
Q.34
The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is
  • sin θ
  • cos θ
  • tan θ
  • cosec θ
Q.35
The coefficient of restitution for elastic bodies is one.
  • Correct
  • Incorrect
Q.36
The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
  • Agree
  • Disagree
Q.37
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity
  • v
  • v/2
  • v/4
  • v/8
Q.38
The friction experienced by a body, when in motion, is known as
  • rolling friction
  • dynamic friction
  • limiting friction
  • static friction
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