under what condition is average velocity equal to the average of the object's initial and final velocity?\

What is the role of the ocular lens?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Heterogeneous mixture with larger particles that never settle is