A car that is traveling west at a constant rate has(1 point)
Responses
acceleration and speed, but no velocity.
acceleration and speed, but no velocity.
speed and velocity, but no acceleration.
speed and velocity, but no acceleration.
speed, but neither velocity nor acceleration.
speed, but neither velocity nor acceleration.
velocity, but neither acceleration nor speed.
speed and velocity, but no acceleration.
The correct response is: speed and velocity, but no acceleration.
The correct answer is: speed, but neither velocity nor acceleration.
To understand why, let's break down the concepts involved:
- Speed: Speed refers to how fast an object is moving, regardless of its direction. It is a scalar quantity because it only has magnitude (a numerical value) but no direction.
- Velocity: Velocity also measures how fast an object is moving, but it includes the direction as well. So, velocity is a vector quantity because it has both magnitude and direction. In other words, velocity represents both the speed at which something is moving and the direction it is moving in.
- Acceleration: Acceleration measures the change in velocity over time. It is the rate at which an object's velocity is changing. Like velocity, acceleration is a vector quantity because it also includes both magnitude and direction.
Now, let's consider the scenario described in the question: a car traveling west at a constant rate. When we say the car is traveling at a constant rate, it means that its speed remains the same over time. However, since the car is traveling west, it does have a direction. Therefore, the car has speed (because it is moving) but it does not have velocity (because velocity includes both speed and direction).
Furthermore, since the car is traveling at a constant rate, its velocity is not changing, which means there is no acceleration. The car's speed remains constant, and it is not accelerating or decelerating.
Therefore, the correct answer is that the car has speed, but neither velocity nor acceleration.