A dragster maintains a speedometer reading

of 100 km/h and passes through a curve with a constant radius.
Which statement is true?
1. The dragster rounded the curve at a
changing velocity of 100 km/h.
2. The dragster moved along a straight line
at a constant velocity of 100 km/h.
3. The dragster rounded the curve at a
changing speed of 100 km/h.
4. All are wrong.
5. The dragster rounded the curve at a con-
stant velocity of 100 km/h.

1. is true, but it should clarify that the direction of the velocity is changing. 100 km/h is a speed, not a velocity

The correct answer is 5. The dragster rounded the curve at a constant velocity of 100 km/h.

Explanation:
In this scenario, the dragster maintains a speedometer reading of 100 km/h throughout the curve. This means that its velocity, which includes both speed and direction, remains constant. A constant velocity indicates that the dragster is moving in a straight line at a constant speed of 100 km/h, even when going through a curve. Therefore, option 2, which states that the dragster moved along a straight line at a constant velocity of 100 km/h, is the correct statement.

To determine the correct statement, let's first understand the terms involved. Velocity refers to the speed and direction of an object, while speed refers to how fast an object is moving. When an object moves in a curve, it experiences a change in direction, which means it is accelerating, even if its speed remains constant.

In this scenario, the dragster has a speedometer reading of 100 km/h, which means its speed remains constant. However, as it passes through a curve with a constant radius, it is changing its direction, which means it is accelerating. Therefore, statement 2 (The dragster moved along a straight line at a constant velocity of 100 km/h) is incorrect.

Since the dragster's speed remains constant but its direction changes, we can conclude that it rounded the curve at a changing speed of 100 km/h. Therefore, statement 3 (The dragster rounded the curve at a changing speed of 100 km/h) is true.

To summarize, the correct statement is: The dragster rounded the curve at a changing speed of 100 km/h, which is statement 3.