Question

read the following sentence from the article.

if a ball is rolled up a hill, the force of gravity
acts on it in the opposite direction of the
motion.

how does this detail develop the article’s central idea?

a it demonstrates how newton’s second law of
motion explains deceleration.

b it demonstrates how newton’s second law of
motion explains acceleration.

c it shows that newton’s second law of motion
explains that a larger mass will lead to a greater
deceleration.

d it shows that newton’s second law of motion
explains that a larger mass will lead to a greater
acceleration.

Explanation:

1. Analyze the scenario: A ball rolled up a hill has gravity acting opposite to its motion, causing it to slow down (deceleration).
2. Recall Newton's Second Law: \( F = ma \), where force causes acceleration (or deceleration, when force is opposite to motion).
3. Evaluate Option A: The detail shows deceleration (slowing down) due to a force (gravity) opposite to motion, which aligns with Newton's Second Law explaining deceleration.
4. Evaluate Option B: The ball is slowing down, not accelerating, so B is incorrect.
5. Evaluate Option C: The scenario doesn't involve mass comparison, so C is irrelevant.
6. Evaluate Option D: The ball is decelerating, and D mentions acceleration with mass, which is incorrect.

Answer:

A. It demonstrates how Newton’s Second Law of Motion explains deceleration.