bh3/4
bh3/8
bh3/12
bh3/36
✅ The correct answer is option D.
Engineering Mechanics MCQs
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
✅ The correct answer is option B.
The range of a projectile is maximum, when the angle of projection is
30°
45°
60°
90°
✅ The correct answer is option B.
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.
Yes
No
✅ The correct answer is option A.
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)
✅ The correct answer is option C.
The velocity ratio for the third system of pulleys is
n
n2
2n
2n – 1
✅ The correct answer is option D.
In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.
TRUE
FALSE
✅ The correct answer is option A.
Moment of inertia of a circular section about its diameter (d) is
πd3/16
πd3/32
πd4/32
πd4/64
✅ The correct answer is option D.
A pendulum which executes one beat per second is known as
simple pendulum
compound pendulum
torsional pendulum
second’s pendulum
✅ The correct answer is option D.
The unit of work in S.I. units is
newton
erg
kg-m
joule
✅ The correct answer is option D.