Question

final exam you must score at least 80% to earn your certificate of completion. a failing score will result in course forfeiture of your course fee—no refunds will be issued. why does removing excess weight from your vehicle improve fuel efficiency? it increases tire pressure. it improves the battery life. it reduces the energy needed to accelerate and maintain speed.

Explanation:

To determine why removing excess weight improves fuel efficiency, we analyze each option:

• "It increases tire pressure" is incorrect because excess weight removal doesn't directly increase tire pressure.
• "It improves the battery life" is irrelevant as battery life isn't directly related to fuel efficiency from weight reduction.
• "It reduces the energy needed to accelerate and maintain speed" is correct. According to physics (Newton's second law, \( F = ma \), and energy principles), less mass means less force (and thus energy) is required to accelerate or maintain motion, reducing fuel consumption.

Answer:

It reduces the energy needed to accelerate and maintain speed.