Newton's Laws Simplified
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Newton's Laws Simplified
Newton’s Three Motion Rules
1. Inertia: An object at rest stays at rest, and a moving object keeps moving in a straight line at the same speed unless an unbalanced force acts on it. Friction and air resistance are forces that can slow moving objects. 2. Force, mass, and acceleration: An unbalanced force changes an object’s motion. For the same object, a bigger net force causes greater acceleration. For the same force, an object with more mass accelerates less. In symbols: force = mass × acceleration (F = ma). 3. Action and reaction: Forces come in equal and opposite pairs. If object A pushes on object B, object B pushes back on object A with an equal force in the opposite direction. The pair acts on two different objects, so the forces do not cancel each other on one object.
- Inertia: its motion will not change unless an unbalanced force acts on it.
- Its mass disappears while it is parked.
- Gravity stops acting on it.
- Action and reaction make every object move.
- A. A running rover keeps rolling until friction slows it.
- B. A stronger net push gives the same rover greater acceleration.
- C. The rover’s wheels push backward on the ground; the ground pushes forward on the wheels.
- Law 2
- Law 3
- Law 1
3 printable pages
Page 1
Page 2
Page 3
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