Theory of Machine
The Coriolis component of acceleration exists whenever a point moves along a path that has

Gravitational acceleration
Tangential acceleration
Linear displacement
Rotational motion

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Open pairs are those which have

Point or line contact between the two elements when in motion
Surface contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion

ANSWER DOWNLOAD EXAMIANS APP