Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

The acceleration of a body sliding down an inclined surface is
A:
g sin θ
B:
g cos θ
C:
g tan θ
D:
none of these
Answer: A
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Which of the following statement is correct in connection with projectiles?
A:
A path, traced by a projectile in the space, is known as trajectory.
B:
The velocity with which a projectile is projected, is known as the velocity of projection.
C:
The angle, with the horizontal, at which a projectile is projected is known as angle of projection.
D:
all of the above
Answer: D
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In order to completely specify angular displacement by a vector, it must fix
A:
direction of the axis of rotation
B:
magnitude of angular displacement
C:
sense of angular displacement
D:
all of these
Answer: D
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The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is
A:
50mm
B:
75mm
C:
87.5mm
D:
125mm
Answer: C
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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
A:
20 N
B:
40 N
C:
80 N
D:
none of these
Answer: A
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