# Astro test 2

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1. Newton's First Law: Law of Inertia
Objects will remain in motion, in a straight line and at a constant speed unless acted upon by a force
2. Net force
• any influence that may change the state of motion of objects
• an unbalanced force
3. Newton's 2nd Law: Law of forces and accelrations
• if ourside net forces act upon objects, then objects are accelerated.
• when this happens objects are accelerated in the direction of the net forces.
• inversely proportional to objects inertia
4. quantitive measurement of inertia
objects mass
5. mass
total amount of material in an object
6. acceleration
• force/mass
• force=mass * acceleration
7. weight
how gravity affects or accelerates mass.
8. scalar quantity
• remains the same no matter where you travel in the universe
• MASS
9. vector quantity
• changes depending on where you are.
• weight
10. inertia
the tendency of the object at rest to remain at rest. and of a body in motion in a straight line at a constant speed.
11. Force
push or pull anything that can cause a body to change velocity.
12. velocity
a physical quantity that indicates both the spped of a body and the direction in which it is moving.
13. Newston's 3rd Law: law of active-reactive forces
• if an ovject exerts a net force upon another object (action), then the second object exerts a second net force upon the first object (reaction)
• the two forces are equal in magnitude but opposite in direction.
• f1=f2
14. The relationship between acceleration and forces
if an outside net force acts upon an object, the object is accelerated in the direction of the net force
15. light
 Author: vpenaloza23 ID: 11040 Card Set: Astro test 2 Updated: 2010-03-18 01:15:36 Tags: Astro test 2 Folders: Description: Astro Test 2 Show Answers: