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Engineering Mechanics

Engineering Mechanics
The maximum efficiency of a lifting machine is

1/(m × V.R.)
m/V.R.
1/m
V.R./m

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Not be effected
Increase
None of these
Decrease

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Engineering Mechanics
The slope on the road surface generally provided on the curves is known as

Angle of friction
None of these
Angle of repose
Angle of banking

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Engineering Mechanics
The bodies which rebound after impact are called

None of these
Elastic bodies
Inelastic bodies
Neither elastic nor inelastic bodies

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Engineering Mechanics
The energy possessed by a body, for doing work by virtue of its position, is called

Kinetic energy
Potential energy
Chemical energy
Electrical energy

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 + sinφ)/(1 - sinφ)
(1 - tanφ)/(1 + tanφ)
(1 - sinφ)/(1 + sinφ)
(1 + tanφ)/(1 - tanφ)

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