None of these
Zero
Maximum
Minimum

## Theory of Machine The unbalanced force due to reciprocating masses

Constant in magnitude and direction both
Varies in direction but constant in magnitude
Varies in magnitude and direction both
Varies in magnitude but constant in direction

## Theory of Machine The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be

Perpendicular to each other
Inclined at 45°
Opposite to each other
Parallel to each other

## Theory of Machine In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, if N coincides with O, then

Acceleration of the piston P is zero and its velocity is maximum
Acceleration of the piston P is maximum and its velocity is zero
Acceleration and velocity of the piston P is maximum
Acceleration and velocity of the piston P is zero

I₂/G
G.I₂
G².I₂
I₂/G²