Diagram and number the following sentences:
- The time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
- A force applied to a body can change the magnitude of the momentum or its direction or both.
- If a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
- If there is no net force acting on a body, either because there are no forces at all or because all forces are precisely balanced by contrary forces, the body does not accelerate and may be said to be in equilibrium.
- Conversely, a body that is observed not to be accelerated may be deduced to have no net force acting on it.
- Quantum mechanics and relativity reduce to Newton’s laws for larger bodies or for bodies moving more slowly.
- Although the principle of inertia is the starting point and the fundamental assumption of classical mechanics, it is less than intuitively obvious to the untrained eye.
- The law of inertia was deduced by Galileo from his experiments with balls rolling down inclined planes.
- When two objects interact, they apply forces to each other of equal magnitude and opposite direction.
- An object will not change its motion unless a force acts on it.