Question

Which of the following examples best represents Newton’s 3rd Law?

Answer 1

Answer:

B. Your stomach jumps when you ride a roller coaster.

Explanation:

Newton's 3rd Law states :

• For every action, there is an equal and opposite reaction. Remember:
• According to this law, forces always act in equal by opposite pairs. Action and reaction force pairs don't cancel each other out because they act on different objects.

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#1: This does not work because this option applies to Newton's second law of motion.

- Newton's second law states that the net force equals the product of mass and acceleration.

• This is because a truck will typically have more mass due to being larger and made with denser materials to increase strength, it has more momentum at the same speed. This increased momentum requires more force to stop it and thus it can take a longer distance if a similar breaking force is applied.

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#2: This option works since it applies to Newton's third law of motion.

• The gravity provides acceleration. That causes force. The rider feels the force as it moves the cars along the coaster track. Newton's third law of motion says, "For every action there is an equal and opposite reaction." So that applied to the student's roller coaster, between the marble and the track.

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#3:  This works but is not the best answer applying to Newton's third law of motion.

• Paddling causes a backward force to be applied against the water as a result water gives forward reaction, which helps it to move forwards.

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Answer:

The answer could vary between B and C, personally I believe B applies to Newton's third law of motion more as it applies and matched every text word for word in the statement of Newton's 3rd law of motion.

Option B is the answer.

Hope this helps,

- ROR