# Integrated Science Chapters 4 and 5

### 11 terms by 15burkal

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to study for test. Teacher: Mr. O'reilly 2011/2012 school year

### interaction

Mutual action between objects where each object exerts an equal and opposite force on the other.

### force pair

The action-reaction pair of forces that occur in an interaction

### Newton's third law

Whenever one object exerts a force on another, the second object exerts an equal and opposite force on the first. Or put another way, "To every action there is always an opposed equal reaction."

### momentum

inertia in motion

mass * velocity

### impulse

the quantity of force * time interval

### impulse=

change in momentum

### conserved

a physical quantity that remains unghanged during a process

### law of conservation of momentum

in the absence of an external force, the momentum of a system remains unchanged. (Net momentum before a collision = net momentum after a collision.)

### elastic collision

a collision in which colliding objects rebound without lasting damage or the release of heat

### inelastic collision

a collision in which colliding objects become tangled together and generate heat

Example: