Theory of Machine
Hammer blow

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

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Theory of Machine
Which of the following statement is correct for involute gears?

The pressure angle is constant throughout the teeth engagement.
A convex flank is always in contact with concave flank.
The interference is inherently absent.
The variation in centre distance of shafts increases radial force.

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Theory of Machine
The magnitude of velocities of the points on a rigid link is

Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center
Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center
Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center
Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

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