Which of these forces could speed up a baseball?

a) applied and frictional forces

b) applied and gravitational forces

c) frictional and gravitational forces

c.the charges if the proton and electron and gravity

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.

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.