La energía cinética (EC) se calcula utilizando la fórmula: \[ EC = \frac{1}{2} m v^2 \] donde: - \( m \) es la masa (en kilogramos), - \( v \) es la velocidad (en metros por segundo). En este caso, tenemos: - Masa \( m = 12 \) kg - Velocidad \( v = 8 \) m/s Sustituyendo los valores en la fórmula: \[ EC = \frac{1}{2} \times 12 \, \text{kg} \times (8 \, \text{m/s})^2 \] Calculamos el cuadrado de la velocidad: \[ (8 \, \text{m/s})^2 = 64

Para calcular el trabajo realizado por el jardinero al levantar el saco de tierra, podemos utilizar la fórmula del trabajo: \[ \text{Trabajo} = \text{Fuerza} \times \text{Distancia} \times \cos(\theta) \] En este caso, la fuerza que aplica el jardinero es de 80 N, la distancia vertical es de 3 metros, y el ángulo \(\theta\) entre la fuerza y la dirección del movimiento es 0° (ya que está levantando el saco en la dirección de la fuerza).

Para calcular la energía cinética (\(E_k\)) de un objeto, se utiliza la siguiente fórmula: \[ E_k = \frac{1}{2} m v^2 \] donde: - \(m\) es la masa del objeto (en kilogramos), - \(v\) es la velocidad del objeto (en metros por segundo). En este caso, tenemos: - \(m = 0.4 \, kg\) - \(v = 10 \, m/s\) Sustituyendo estos valores en la fórmula: \[ E_k = \frac{1}{2} \times 0.4 \, kg \times (10 \, m/s)^2 \] Primero, calculamos \( (10 \, m/s)^2

Para calcular el trabajo (W) realizado por el patinador durante su aceleración, podemos utilizar la fórmula: \[ W = F \cdot d \] Donde: - \( W \) es el trabajo, - \( F \) es la fuerza neta aplicada, y - \( d \) es la distancia. Primero, debemos calcular la fuerza neta (F) usando la segunda ley de Newton: \[ F = m \cdot a \] Donde: - \( m \) es la masa (60 kg), - \( a \) es la aceleración (6 m/s²). Sustituyendo los valores: \[ F = 60 \,

Para calcular la potencia promedio desarrollada durante el levantamiento de la caja, primero necesitamos encontrar el trabajo realizado y luego dividirlo por el tiempo. 1. **Cálculo del trabajo realizado (W)**: El trabajo realizado en levantar un objeto se calcula como: \[ W = F \times d \] donde: - \( F \) es la fuerza aplicada (en Newtons) - \( d \) es la distancia (en metros) En este caso, la fuerza \( F \) es de 220 N y la altura \( d \)

Para calcular la energía cinética (EC) de un objeto, utilizamos la siguiente fórmula: \[ EC = \frac{1}{2} m v^2 \] donde: - \( m \) es la masa del objeto (en kilogramos), - \( v \) es la velocidad (en metros por segundo). En este caso, la masa del cohete es \( m = 1000 \, \text{kg} \) y su velocidad máxima es \( v = 20,000 \, \text{m/s} \). Sustituyendo los valores en la fórmula: \[ EC = \frac{1}{2} \times 1000 \, \text{kg} \times

Para calcular la potencia promedio desarrollada durante el levantamiento, primero necesitamos calcular el trabajo realizado y luego dividirlo por el tiempo. 1. **Cálculo del trabajo:** El trabajo (W) se puede calcular usando la fórmula: \[ W = F \times d \] donde: - \( F \) es la fuerza aplicada (en newtons), - \( d \) es la distancia (en metros). En este caso: - \( F = 400 \, \text{N} \) - \( d = 4 \, \text{m} \) Así que: \[ W = 400 \,

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