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Questions and Answers
What does Newton's first law of motion state about an object at rest?
What does Newton's first law of motion state about an object at rest?
- It will only stay at rest if it is in a vacuum.
- It will change its state only when an opposite force is applied.
- It will remain at rest unless acted upon by a net external force. (correct)
- It will eventually start moving on its own.
According to Newton's second law of motion, how is acceleration of an object related to the net force acting on it?
According to Newton's second law of motion, how is acceleration of an object related to the net force acting on it?
- Acceleration is always equal to the force applied.
- Acceleration increases as the mass of an object increases.
- Acceleration is directly proportional to net force and inversely proportional to mass. (correct)
- Acceleration is independent of the net force.
What is the principle behind Newton's third law of motion?
What is the principle behind Newton's third law of motion?
- For every action, there is an equal and opposite reaction. (correct)
- The total momentum of a system is always conserved.
- For an object to move, a force must be continuously applied.
- An object in motion tends to stay in motion.
Which scenario best illustrates the concept of inertia as described by Newton's laws?
Which scenario best illustrates the concept of inertia as described by Newton's laws?
Which condition is necessary for an object to achieve unbalanced motion according to Newton's laws?
Which condition is necessary for an object to achieve unbalanced motion according to Newton's laws?
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Study Notes
Newton's Laws of Motion
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An object at rest will remain at rest unless acted upon by a net force.
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Acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
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For every action, there is an equal and opposite reaction.
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A book lying on a table remains at rest until someone picks it up. This is because the book is at rest, and it will remain at rest unless an unbalanced force acts upon it.
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An unbalanced force is required for an object to achieve unbalanced motion. An unbalanced force is a force that causes a change in the motion of an object. For example, if you push a box across a room, you are applying an unbalanced force to the box, causing it to move.
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