A football coach paces back and forth along the sidelines during a close rivalry game. the diagram below shows several of the coach's positions and various times. At each marked positions, the coach makes a u-turn and moves the opposite direction. In other words, the coach moves from position a to b to c to d. (Could someone please explain this. Thank you)

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

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.

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.