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

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

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Strength of Materials
Limiting force of friction is the

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

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Strength of Materials
Center of percussion is

the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
point of suspension
the point of C.G.
the point of metacentre

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Strength of Materials
According to principle of transmissibility of forces, the effect of a force upon a body is

The same at every point in its line of action
Minimum when it acts at the C.G. of the body
Different at different points in its line of action
Maximum when it acts at the center of gravity of a body

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