Force+Mass+Acceleration+Article

1st and 2nd Law Reading

Write six bullet point summarized facts from the article. Write the question. See how the bullet points answered the question.

Question (Turning the topic of the article into a question.) What happens to a body when an external force is applied to it?

Article: __Force Mass Acceleration Law__ Isaac Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force." What, then, happens to a body when an external force is applied to it? That situation is described by Newton's Second Law of Motion.

Newton’s second law states that acceleration depends on the net force acting on the object and on the object’s mass. This means, for a constant mass, force equals mass times acceleration." This is written in mathematical form as F = ma

F is force, m is mass and a is acceleration. The math behind this is quite simple. If you double the force, you double the acceleration, but if you double the mass, you cut the acceleration in half.

For a massive body moving without any other forces such as friction acting on it, a certain force will cause a certain change in its velocity every time. The body might speed up, slow down or change direction, after which, the body will continue moving at a new constant velocity (unless, of course, the force causes the body to stop).

Acceleration is measured in meters per second per second, net force is measured in newtons, and mass is measured in kilograms. You can think of 1 newton as the force required to give a 1-kg mass an acceleration of 1 meter per second per second. Remember F = M x A so A = F/M.

More: http://www.physicsclassroom.com/class/newtlaws/Lesson-3/Newton-s-Second-Law