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To determine the correct answer for "Pregunta 7," I would need to know the complete problem context, including the specific question related to time \( t = 7.5 \, \text{s} \). The options you provided are velocity values:

- a. Ninguna de las anteriores
- b. \( 0 \, \text{m/s} \)
- c. \( -5 \, \text{m/s} \)
- d. \( 5 \, \text{m/s} \)
- e. \( -2.5 \, \text{m/s} \)

However, without more information, such as the formula or initial conditions, it is difficult to determine the correct velocity at \( t = 7.5 \, \text{s} \).

Could you provide the full question or clarify any given equations? This will allow me to analyze the data and solve the problem accurately.

Once clarified, I will provide the correct answer. Do you have any additional details or need further assistance?

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Here are five related questions to help you better understand this type of problem:

1. What is the initial velocity of the object at \( t = 0 \, \text{s} \)?
2. Is the motion described by any specific equation, such as uniform acceleration or constant velocity?
3. How do you calculate the velocity at a given time when acceleration is constant?
4. What is the physical significance of a negative velocity?
5. Can you describe a situation where an object would have a velocity of \( 0 \, \text{m/s} \) at a specific time?

**Tip:** Always identify the type of motion (uniform, accelerated, etc.) before solving for variables like velocity or position.

Pregunta 7: Determina la velocidad en el instante t = 7.5 s.

Learn how to calculate the velocity of an object at t = 7.5 seconds using key kinematics concepts like velocity, acceleration, and time. This example uses equations of motion to find the correct answer. Suitable for high school students studying physics or kinematics.

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