Is The Car Speeding Up or Slowing Down? | Summary and Q&A

TL;DR

Learn how to determine if an object or vehicle is speeding up or slowing down based on its velocity and acceleration.

Key Insights

• ❎ Velocity decreases when acceleration is negative and increases when acceleration is positive.
• 🐎 Speed is always positive and can be determined by taking the absolute value of velocity.
• 🤘 The signs of velocity and acceleration determine if a vehicle is speeding up or slowing down.

Transcript

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Questions & Answers

Q: How can we determine if the velocity of a car is increasing or decreasing?

The sign of the acceleration tells us whether the velocity is increasing or decreasing. Negative acceleration indicates decreasing velocity, while positive acceleration indicates increasing velocity.

Q: What is the difference between speed and velocity?

Speed refers to the absolute value of velocity and is always positive. Velocity includes direction and can be positive or negative.

Q: Is it possible for a vehicle to speed up while having a negative velocity?

Yes, if both the velocity and acceleration are negative, the vehicle is still considered to be speeding up.

Q: How can we determine if a vehicle is speeding up or slowing down quickly?

By comparing the signs of velocity and acceleration, we can determine if the vehicle is speeding up (same sign) or slowing down (different signs).

Summary & Key Takeaways

• Velocity is increasing if the acceleration and velocity have the same sign, while velocity is decreasing if they have opposite signs.

• Speed is always positive, and it can be determined by taking the absolute value of velocity.

• By analyzing the signs of velocity and acceleration, you can quickly determine if a car is speeding up or slowing down.