Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium.
A:
Yes
B:
No
C:
D:
Answer: A
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A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is
A:
5
B:
10
C:
20
D:
40
Answer: B
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The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
A:
same at every point on its line of action
B:
different at different points on its line of action
C:
minimum, if it acts at the centre of gravity of the body
D:
maximum, if it acts at the centre of gravity of the body
Answer: C
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If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A:
change
B:
does not change
C:
D:
Answer: B
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A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
A:
m1/m2
B:
m1.g sin α
C:
m1.m2/m1+m2
D:
Answer: D
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