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The motion of a wheel of a car is
NONE OF THESE
purely translation
combined translation and rotational
purely rotational
The velocity ratio for the first system of pulleys is(where n is the number ofpulleys.
)
n
2n
2n - 1
N2
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
bh3/8
bh3/12
bh3/36
bh3/4
The length of a second's pendulum is
101cm
99.4cm
100cm
94.9cm
The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
Q = 2R
p = q
NONE OF THESE
Q = R
The maximum efficiency of a lifting machine is
1/M
1/(m x V.R.)
R./m
m/V.R.
The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by
P - Q
Q / P
P + Q
P / Q
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken inorder.
The forces are equivalent to a couple whose moment is equal to
area of the triangle
NONE OF THESE
half the area of the triangle
twice the area of the triangle
The unit of energy in S.
I. units is
dyne
watt
Joule
kg-m
The moment of inertia of a solid sphere of mass m and radius r is
Mr2
mr2/2
2mr2/5
2mr2/3
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (
i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its
C.G., and h = Distance between
C.G. and the parallelaxis.
)
IP = IG + Ah2
IP = IG - Ah2
IP = IG / Ah2
IP = Ah2 / IG
The coefficient of restitution for inelastic bodies is
between zero and one
One
Zero
more than one
A framed structure is imperfect, if the number of members are __________
(2j -
3)
Equal to
Less than
Either (B) or (C)
Greater than
In order to determine the effects of a force, acting on a body, we must know
nature of the force i,e. whether the force is push or pull
All of the above
line of action of the force
magnitude of the force
The total energy possessed by a system of moving bodies
varies from point to point
is minimum in the start and maximum at the end
is maximum in the start and minimum at the end
is constant at every instant
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the samedirection.
This is known as
NONE OF THESE
principle of resolution of forces
principle of transmissibility of forces
principle of independence of forces
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 thebody.
)
P = W (cosα + μsinα)
P = W (sinα + μcosα)
P = W tan(α + φ)
P = W tanα
Non-coplaner concurrent forces are those forces which
meet at one point, but their lines of action do not lie on the same plane
do not meet at one point and their lines of action do not lie on the same plane
do not meet at one point, but their lines of action lie on the same plane
meet at one point and their lines of action also lie on the same plane
A force while acting on a body may
give rise to the internal stresses in it
All of These
change its motion
balance the forces, already acting on it
The unit of force in S.
I. system of units is
Kilogram
dyne
watt
newton
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