Physical Science Chapter 6.3 Newton's Laws of Motion
Terms in this set (10)
What is Newton's 1st Law of Motion?
States that when an object at rest remains at rest unless acted upon by a nonzero net force.
What is Inertia?
Resistance to change in motion. For example, why you move forward in your seat when the car you are in stops suddenly. You keep moving forward.
Why does inertia depend on mass?
The greater the mass of an object, the greater its inertia, and the greater the force required to change its motion. For example, the full backpack is harder to move than the empty one because it has more mass and therefore more inertia.
What is Newton's 2nd Law of Motion?
The acceleration of an object depends on the mass of the object and the net force acting on it.
What is the formula that shows Newton's 2nd law of motion?
Acceleration = Netforce/Mass
How is acceleration measured according to Newton's second law of motion?
in meters per second (m/s2)
What is Newton's 3rd Law of Motion?
states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object. Another way to state this is for every action there is an equal and opposite reaction
What is an example of Newton's 3rd law of motion according to the text?
For example, if you lean against a wall and it didn't push back on you, you'd fall through. The force exerted by the wall is equal in strength and opposite in direction to the force you exert on the wall.
Do action-reaction forces cancel?
No because they act on different objects.
What is an example of action-reaction force according to the text?
The swimmer exerts a backward action force on the water with her hands. The water exerts an equal but opposite forward reaction force on her hands. This propels her body forward.
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