Strength of Materials
The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are

2 and 5
3 and 1 kg
V5 and V5
2 and V6

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Strength of Materials
Coefficient of friction is the

the friction force acting when the body is just about to move
angle between normal reaction and the resultant of normal reaction and the limiting friction
the friction force acting when the body is in motion
ratio of limiting friction and normal reaction

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Strength of Materials
If a rigid body is in equilibrium under the action of three forces, then

these forces are equal
the lines of action of these forces meet in a point
the lines of action of these forces are parallel
the lines of action of these forces meet in a point & the lines of action of these forces are parallel

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Strength of Materials
Kinetic friction is the

Ratio of limiting friction and normal reaction
Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction
The friction force acting when the body is just about to move
The friction force acting when the body is in motion

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Strength of Materials
In actual machines

mechanical advantage is less than velocity ratio
mechanical advantage is equal to velocity ratio
mechanical advantage is greater than velocity ratio
mechanical advantage is unity

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