BRL: Braille through Remote Learning

This is a section from an elementary science textbook. The braille shows the running head, the chapter heading, and a part of the text. Some of the text is found on print page 10, continuing over to Page 11. The braille shows the use of the page separation device.

SCIENCE INTERACTIONS

Chapter 1: Forces and Pressure

Since the 20 gram mass had the same inertia in both cases, it would require a horizontal force to make it move in the direction of the paper. You exerted a horizontal force on the paper when you pulled it, but you didn't exert a force directly on the mass. Therefore, the paper must have exerted the horizontal force on the mass.
What if there were no friction? Your feet couldn't grip the ground. You couldn't accelerate unless something bumped into you and started you going. Once you were moving, you'd keep moving at a constant speed until you interacted with something else.

Like friction, gravitational interaction is so common that we usually ignore it. You know that free falling objects accelerate. This acceleration is due to gravitational force, which pulls you toward Earth's center. When a ball is dropped, Earth is exerting a force that accelerates the ball downward. Is the ball causing Earth to accelerate upward, too?

Look at the braille equivalent in a separate window.

Developed by

The Shodor Education Foundation, Inc.
in cooperation with the
North Carolina Central University
and the Governor Morehead School for the Blind