At What Rate Is the Gravitational Force on a 2 $\degree$

question 72

Multiple Choice

At what rate is the gravitational force on a 2.0-kg projectile doing work at an instant when the velocity of the projectile is 4.0 m/s directed 30 $\degree$ above the horizontal?

• A)+39 W
• B)-78 W
• C)-39 W
• D)+78 W
• E)+25 W

---

Definitions:

Video-Game Skills

Abilities and competencies related to playing video games, including hand-eye coordination, strategic thinking, and problem-solving.

Understanding and Prediction

The cognitive processes of comprehending information or situations and anticipating future events or outcomes.

Science Goal

An objective or aim related to gaining knowledge, understanding phenomena, or solving problems using systematic and empirical methods characteristic of the sciences.

Scientific Method

A systematic process of inquiry involving observation, hypothesis formulation, experimentation, and conclusion to test scientific theories and gain knowledge.