Newton's Laws of Motion Flashcards
What does Newton’s first law state?
A body will remain at rest or continue to move in straight line at a constant velocity unless a constant velocity unless an external force acts on it.
What does Newton’s second law state?
The resultant force on an object is proportional to the rate of change of momentum of the object, and the momentum change takes place in the direction of the force.
What does Newton’s third law state?
If object A exerts a force on object B, then object B will exert an equal but opposite force on object A.
What are the requirements for the third law to be used?
The forces must be the same type and acting in opposite directions on different objects.
What does the principle of conservation of momentum state?
The total momentum before a collision is always equal to the total momentum after the collision, provided no external forces are involved.
What is impulse?
The product of a force and the time for which the force acts.
What does the area beneath a force-time graph represent?
The impulse
What is an elastic collision?
A collision in which the momentum and kinetic energy are conserved (no energy converted to other forms).
What is an inelastic collision?
A collision in which momentum is conserved but some of the kinetic energy is moved to other forms.
