Two Balls of Equal Mass Are Thrown Toward Each Other

question 20

True/False

Two balls of equal mass are thrown toward each other with the same speed and at the same angle to the horizontal by two people standing a certain distance apart on the ground. Following an elastic collision, the balls will always return to their respective throwers with the same speed.

---

Definitions:

Observer Effect

The phenomenon in which the act of observation alters the behavior of the subject being observed, often considered in psychological research and quantum physics.

Experimenter Bias

A form of research bias where the expectations of the researcher unintentionally influence the outcome of an experiment.

Subject Bias

A form of bias caused by variations in participants' responses for reasons unrelated to the experimental manipulation.

Rating Scale

Assessment in which a numerical value is assigned to specific behavior that is listed in the scale.