Question

speed-velocity-acceleration inquiry lab
reflection questions:

1. if you were to run the car down the last ramp again, how could you change the velocity of the car without changing the speed?

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1. since speed = distance ÷ time, then time = distance ÷ speed. if your car had a constant speed of 2.5 meters/second, how much time would it take to travel 10 meters?

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Explanation:

Question 1

Velocity is a vector quantity (has both magnitude and direction), while speed is a scalar quantity (only magnitude). To change velocity without changing speed, we need to change the direction of the car's motion. For example, if the car was moving straight down the ramp, we could have it follow a curved path (while keeping the magnitude of its speed constant). This would change the direction of its velocity vector.

Step1: Identify the formula

We use the formula \(t=\frac{d}{v}\), where \(t\) is time, \(d\) is distance, and \(v\) is speed.

Step2: Substitute the values

Given \(d = 10\space m\) and \(v=2.5\space m/s\), we substitute into the formula: \(t=\frac{10}{2.5}\)

Step3: Calculate the result

\(t = 4\space s\)

Answer:

Change the direction of the car's motion (e.g., have it follow a curved path instead of a straight - line path down the ramp)

Question 2