Quantcast
Newton's Second Law of Motion - force equals mass times acceleration
Quatr.us answers questions
Upgrade /Log in
Options /Log out
Print
About
Africa
Egypt
Mesopotamia
Early Europe
Greece
Rome
China
India
Central Asia
Medieval
Islamic Empire
Native Americans
S./Central America
American History
Biology
Chemistry
Geology
Math
Physics
Weather
Food
Judaism
Christianity
Home

Newton's Second Law of Motion

Pitcher

Newton's Second Law of Motion tells us that

Force equals mass times acceleration.

You can tell how hard a moving object is going to hit by knowing how big it is (how much mass it has) and how fast it is speeding up (its acceleration). For instance, if the pitcher throws the ball to the catcher, how hard it hits the catcher's glove depends on how much mass the ball has and whether it is speeding up or slowing down when it gets to the glove. You can make something hit harder either by making it bigger or by throwing it faster.

Learn by doing: a project with momentum
Newton's Third Law

Bibliography and further reading about Newton's Laws of Motion:

Gravity
Momentum
Friction
Physics
Quatr.us home


Professor Carr

Karen Eva Carr, PhD.
Assoc. Professor Emerita, History
Portland State University

Professor Carr holds a B.A. with high honors from Cornell University in classics and archaeology, and her M.A. and PhD. from the University of Michigan in Classical Art and Archaeology. She has excavated in Scotland, Cyprus, Greece, Israel, and Tunisia, and she has been teaching history to university students for a very long time.

Professor Carr's PSU page

Help support Quatr.us!

Quatr.us (formerly "History for Kids") is entirely supported by your generous donations and by our sponsors. Most donors give about $10. Can you give $10 today to keep this site running? Or give $50 to sponsor a page?

And now it's already Ash Wednesday! Ash Wednesday is the first day of the Christian holy days of Lent. Lent marks the last hungry days before new food starts growing in the spring. The end of Lent is Easter, remembering Jesus and the Resurrection. Easter's descended from earlier spring holidays like the Zoroastrian Nowruz, and the Jewish Passover.