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Calculate the acceleration of an athlete who reaches a maximum speed of [tex]$12 \, \text{m/s}$[/tex] in four seconds after starting the race.

Given:
Initial velocity, [tex]u = 0 \, \text{m/s}[/tex] (starting from rest)
Final velocity, [tex]v = 12 \, \text{m/s}[/tex]
Time taken, [tex]t = 4 \, \text{s}[/tex]

Formula:
Acceleration, [tex]a = \frac{v - u}{t}[/tex]

Calculate the acceleration during that time.

Sagot :

Para encontrar la aceleración de un atleta que alcanza su velocidad máxima de [tex]\( 12 \, \text{m/s} \)[/tex] en un período de [tex]\( 4 \)[/tex] segundos, debemos utilizar la fórmula para la aceleración ([tex]\( a \)[/tex]), que es la razón del cambio en la velocidad con respecto al tiempo. La fórmula se expresa como:

[tex]\[ a = \frac{v_f - v_i}{t} \][/tex]

donde:
- [tex]\( v_f \)[/tex] es la velocidad final,
- [tex]\( v_i \)[/tex] es la velocidad inicial,
- [tex]\( t \)[/tex] es el tiempo transcurrido.

Paso a paso:

1. Identificar los valores dados:
- Velocidad final ([tex]\( v_f \)[/tex]): [tex]\( 12 \, \text{m/s} \)[/tex]
- Velocidad inicial ([tex]\( v_i \)[/tex]): [tex]\( 0 \, \text{m/s} \)[/tex] (asumiendo que el atleta comienza desde el reposo)
- Tiempo ([tex]\( t \)[/tex]): [tex]\( 4 \)[/tex] segundos

2. Sustituir los valores en la fórmula de la aceleración:

[tex]\[ a = \frac{12 \, \text{m/s} - 0 \, \text{m/s}}{4 \, \text{s}} \][/tex]

3. Realizar la resta y el cálculo:

[tex]\[ a = \frac{12 \, \text{m/s}}{4 \, \text{s}} = 3 \, \text{m/s}^2 \][/tex]

Por lo tanto, la aceleración del atleta durante los cuatro segundos es de [tex]\( 3 \, \text{m/s}^2 \)[/tex].
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