Theory of Machine
A kinematic chain requires at least

5 links and 4 turning pairs
2 links and 3 turning pairs
3 links and 4 turning pairs
4 links and 4 turning pairs

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Theory of Machine
Hammer blow

Varies inversely with the square of the speed
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses
Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Varies as the square root of the speed

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Theory of Machine
The steering of a ship means

Turning of a complete ship in a curve towards right or left, while it moves forward
Rolling of a complete ship sideways
None of these
Movement of a complete ship up and down in vertical plane about transverse axis

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