Question

Which of the following is an example in which you are traveling at constant speed but not at constant velocity?

1) riding south in a train at constant speed
2) driving around in a circle at exactly 100 km/hr
3) driving backward at exactly 50 km/hr
4) none of the above

Answer 1

Driving around in a circle at a constant speed is an example where you have a constant speed but not a constant velocity due to the changing direction.

Step-by-step explanation:

The scenario where you are traveling at constant speed but not at constant velocity is when you are driving around in a circle at exactly 100 km/hr. This is because velocity is a vector quantity, which means it includes both speed and direction. While your speed remains the same as you travel around the circle, the direction is constantly changing, which means your velocity is not constant even though your speed is. Constant speed means the magnitude of the velocity is constant, but velocity is a vector quantity that includes both speed and direction. When you're driving around in a circle at a constant speed, your direction is constantly changing, so your velocity is not constant. In the other examples, the direction is constant, so the velocity is constant as well.