There are many different types of scientific investigations, including controlled experiments, observational field studies, the collection of specimens, and model-building. Which type of investigation is best used to study global weather patterns? A. model-building B. observational field studies C. controlled experiments D. the collection of specimens

It really was model-building, i did it on studyisland

Explanation:

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

we need to know the time interval during which the force acts. impulse of force = momentum change