|
|
 |
|
|
 |
|
What is a force?
|
|
A force is something that changes an object's speed or direction. Forces always exist in pairs acting in opposite directions. When a rifle is fired, the rifle kicks back as the bullet flies forward. A heavier football player running faster applies a greater force than a lighter, slower player.
|
| |
Previous:
Back
|
Book:
Best Ever Q&A
|
Section:
Science & Technology
|
Chapter:
Forces & Energy
|
|
|
|
 |
|
|
