Physics · Force and Laws of Motion
To demonstrate the relationship between inertia and mass, a student compares the difficulty of kicking a football versus kicking a stone of equal size. Which principle justifies the greater difficulty and potential injury associated with kicking the stone?
- 1The stone has lower surface friction, causing all force to be transmitted.
- 2The stone possesses greater mass, which results in greater inertia, meaning it offers larger resistance to changing its state of rest.✓
- 3The stone is subject to the First Law of Motion, while the football is governed by the Second Law.
- 4The force applied to the stone is insufficient to overcome the centripetal force holding its atoms together.
Correct answer
The stone possesses greater mass, which results in greater inertia, meaning it offers larger resistance to changing its state of rest.
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