51. Two forces are acting at an angle of 120°. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is
20 N
40 N
80 N
none of these
✅ The correct answer is option A.
Engineering Mechanics MCQs
52. Which of the following statement is correct in connection with projectiles?
A path, traced by a projectile in the space, is known as trajectory.
The velocity with which a projectile is projected, is known as the velocity of projection.
The angle, with the horizontal, at which a projectile is projected is known as angle of projection.
all of the above
✅ The correct answer is option D.
53. The moment of inertia of a square of side a about its diagonal is
a2/8
a3/12
a4/12
a4/16
✅ The correct answer is option C.
54. The amplitude is always __________ radius of the circle.
equal to
less than
greater than
✅ The correct answer is option A.
55. Newton’s second law motion __________ a relation between force and mass of a moving body.
gives
does not give
✅ The correct answer is option A.
56. When a particle moves along a circular path, its acceleration has two components, one is normal component and the other is tangential component of acceleration.
TRUE
FALSE
✅ The correct answer is option A.
57. The law of motion involved in the recoil of gun is
Newton’s first law of motion
Newton’s second law of motion
Newton’s third law of motion
none of these
✅ The correct answer is option C.
58. If the gravitational acceleration at any place is doubled, then the weight of a body will be
g/2
g
2g
2g
✅ The correct answer is option D.
60. In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.
less than
equal to
more than
✅ The correct answer is option A.