Chapter 11 Lesson 2
By Matthew Trollson
Momentum
Momentum is the combination of an objects mass and speed. Total momentum does not change when two objects collide. Scientists call this the conservation of momentum. Example: A baseball and tennis ball are thrown at the same speed and distance. The baseball would have more momentum because it has more mass.
Newton's Laws of Motion
Newton's First Law
Objects in motion tend to stay in motion, and objects in rest tend to stay in rest unless acted upon by an unbalanced force.
Newton's Second Law
Acceleration depends on the object's mass and the amount of net force applied to it.
Newton's Third Law
For every action there is an equal and opposite reaction force.
Weightlessness
The state of weightlessness is feeling like not having any weight. It would be measured as 0 pounds (or any other measurement of weight). Skydivers feel weightless because of an upward force, called air resistance.
By Matthew Trollson
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