Four springs are stretched to the same distance from the equilibrium position the spring constants are listed in the table

Rohit is trying to tune an instrument

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory