The three vehicles shown below are all traveling at a speed of 15 m/s, but only the pickup truck has a changing velocity. The pickup truck has a changing velocity because the pickup truck... (8.P.2A.7)
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is traveling on a curve in the road
needs a large amount of force to move
can accelerate faster than the other two vehicles
is traveling in the opposite direction from the other two vehicles
The pickup truck has a changing velocity because it is traveling on a curve in the road.
Yes, remember velocity includes speed AND DIRECTION
Correct, velocity includes both speed and direction. The pickup truck is changing its velocity because it is traveling on a curve in the road, which means its direction is constantly changing.
To determine why the pickup truck has a changing velocity while the other two vehicles do not, we need to understand the concept of velocity and its relationship with acceleration. Velocity is a vector quantity that describes an object's speed and direction of motion. Acceleration, on the other hand, measures the rate at which an object's velocity changes.
In this scenario, all three vehicles have the same speed of 15 m/s. However, only the pickup truck has a changing velocity. This means that the direction of the pickup truck is changing, while the other two vehicles continue to move in the same direction.
From the given options, we can eliminate the ones that do not align with the concept of changing velocity:
1. Traveling on a curve in the road: When a vehicle travels on a curve, its path changes, but the velocity may remain constant. Consider a car moving on a circular racetrack at a constant speed; although it is changing direction, its velocity remains the same. Therefore, this option is not the correct answer.
2. Needing a large amount of force to move: The amount of force required to move a vehicle does not necessarily determine whether its velocity is changing. A vehicle may require a large amount of force but still move in a straight line with a constant velocity. Hence, this option is not the correct answer.
Now let's consider the remaining options:
3. Traveling in the opposite direction from the other two vehicles: If the pickup truck were traveling in the opposite direction compared to the other two vehicles, their velocities would indeed be changing. As the pickup truck moves against the original direction, its velocity changes because it now has a negative velocity component. Therefore, this option aligns with the concept of changing velocity.
4. Can accelerate faster than the other two vehicles: Although acceleration is related to changing velocity, it does not necessarily mean that the object with a higher acceleration will have a changing velocity. Acceleration measures the rate at which the velocity changes, but it does not guarantee that the object's velocity will change. Therefore, this option is not the correct answer.
Consequently, based on the options and the concept of changing velocity, the correct answer is: "The pickup truck is traveling in the opposite direction from the other two vehicles."