Explore IDNLearn.com's extensive Q&A database and find the answers you're looking for. Get thorough and trustworthy answers to your queries from our extensive network of knowledgeable professionals.
Sagot :
Final answer:
The velocity of an object in free fall from a given height can be determined using the equation of motion. In this case, the pen's velocity before touching the ground is 16 m/s.
Explanation:
The velocity of the pen right before touching the ground can be calculated using the equation of motion for free fall. Since the pen falls from a height of 20 meters and takes 8 seconds to fall, its velocity just before hitting the ground would be 16 m/s.
Learn more about Free fall velocity calculation here:
https://brainly.com/question/30467259
Answer:
Para encontrar la velocidad en el momento justo antes de tocar el suelo, podemos usar la ecuación de la cinemática:
\[ v = v_0 + at \]
Donde:
- \( v \) es la velocidad final (la que estamos buscando).
- \( v_0 \) es la velocidad inicial, que en este caso es cero ya que el lápiz está en reposo antes de caer.
- \( a \) es la aceleración debida a la gravedad, que en la Tierra es aproximadamente \( 9.8 \, \text{m/s}^2 \) hacia abajo.
- \( t \) es el tiempo que tarda en caer, que en este caso es 8 segundos.
Sustituyendo los valores conocidos:
\[ v = 0 + (9.8 \, \text{m/s}^2)(8 \, \text{s}) \]
\[ v = 78.4 \, \text{m/s} \]
Por lo tanto, la velocidad justo antes de tocar el suelo es de \( 78.4 \, \text{m/s} \).
We value your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Your questions are important to us at IDNLearn.com. Thanks for stopping by, and come back for more reliable solutions.