Two parallel forces 20 kg and 15 kg act. In order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by
5.5 kg
6.25 kg
8.75 kg
10.5 kg
Correct Answer :
C. 8.75 kg
Related Questions
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Joule
Newton
Dyne
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0.50
0.40
0.67
1.00
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Velocity
Acceleration
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None of these
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2u sinα/g
2u cosα/g
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2u cotα/g
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kg.m/sec
kg.m/sec
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0.7 m/sec2
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y = c cosh x/c
y = c sinh x/c
y = c tan x/c
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v = ω √(y² - r²)
y = ω √(y - r)
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Lami's theorem states that
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Three coplanar forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two
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60 kg
72 kg
None of these
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6 m/sec
12 m/sec
24 m/sec
48 m/sec
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Any coplanar force system
A system of parallel forces only
Concurrent coplanar force system
Non-concurrent coplanar force system
If α is the angular acceleration of a compound pendulum whose angular displacement is θ, the frequency of the motion is
2π √(α/θ)
(1/2π) √(α/θ)
4π √(α/θ)
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Support reactions
Resultant of horizontal thrust and support reaction
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2.44 times less
3 times less
3 times more
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Supports
Quarter span
Mid span
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Circular
Catenary
Elliptical
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2 J
4 J
6 J
8 J
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2.0 cm
1.5 cm
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Involute
Centroid
Spiral
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3t3 - 2t
3t2 + 2t
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6t + 2
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Centrifugal force
Centripetal force
None of these
A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if
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Floor is rough and the wall is smooth
Floor and wall both are smooth surfaces
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Be in equilibrium
Always reduce to a resultant force
Always reduce to a couple
Both (A) and (C)