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Questions and Answers
A moving stone and a sack of cotton, both weighing 50 kg, will require the same force to stop them.
A moving stone and a sack of cotton, both weighing 50 kg, will require the same force to stop them.
True (A)
An object will always change its motion if a force is applied to it.
An object will always change its motion if a force is applied to it.
True (A)
The first law of motion is also known as the law of force.
The first law of motion is also known as the law of force.
False (B)
A basketball has greater inertia than a truck.
A basketball has greater inertia than a truck.
Inertia is directly proportional to the mass of an object.
Inertia is directly proportional to the mass of an object.
Aristotle believed that an object in motion will eventually come to rest due to friction.
Aristotle believed that an object in motion will eventually come to rest due to friction.
An object in motion will always continue to move in a straight line if no net force acts on it.
An object in motion will always continue to move in a straight line if no net force acts on it.
If the net force acting on an object is zero, the object will accelerate.
If the net force acting on an object is zero, the object will accelerate.
Galileo's observations on horizontal motion are only applicable to horizontal motion.
Galileo's observations on horizontal motion are only applicable to horizontal motion.
Inertia is the tendency of an object to resist changes in its velocity.
Inertia is the tendency of an object to resist changes in its velocity.
Study Notes
Forces and Motion
- A greater force is required to stop a moving stone than a stationary sack of cotton, both weighing 50 kg, due to the stone's motion.
Inertia
- The presence of a force always results in changes to an object's motion.
- The first law of motion is also referred to as the law of inertia.
Comparing Inertia
- A truck has more inertia than a basketball due to its larger mass.
Inertia and Mass
- Inertia is inversely proportional to the mass of an object.
Force and Motion
- A balanced force is required to change the motion of an object.
- Inertia is the tendency of an object to resist changes in its motion, which is why a person riding a car would tend to move forward when the car stops suddenly.
- If the net force acting on a stationary object is zero, the object will not move.
- Aristotle believed that a moving object does not require force to keep moving, which is opposite to Newton's law.
- Newton built upon Galileo's observation on horizontal motion and extended it to include vertical motion, suggesting that these motions can be thought of as the same thing.
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Description
Test your understanding of inertia and its relationship with force, mass, and motion. Evaluate your knowledge of Newton's first law of motion and its applications.
