always use significant figure rules. remember that these rules apply to all numbers that are measurements…

always use significant figure rules. remember that these rules apply to all numbers that are measurements. if a car goes along a straight road heading east and speeds up from 45 ft/s to 60 ft/s in 5 s, calculate the acceleration. a = ft/s²

always use significant figure rules. remember that these rules apply to all numbers that are measurements. if a car goes along a straight road heading east and speeds up from 45 ft/s to 60 ft/s in 5 s, calculate the acceleration. a = ft/s²

Answer

Explicación:

Paso 1: Identificar los valores dados

$v_i = 45$ ft/s (velocidad inicial), $v_f=60$ ft/s (velocidad final), $t = 5$ s (tiempo).

Paso 2: Aplicar la fórmula de la aceleración

La fórmula de la aceleración es $a=\frac{v_f - v_i}{t}$. Sustituimos los valores: $a=\frac{60 - 45}{5}$.

Paso 3: Realizar el cálculo

$a=\frac{15}{5}=3$ ft/s². Pero considerando las reglas de cifras significativas, ya que los datos de entrada ($45$, $60$ y $5$) tienen dos cifras significativas, el resultado debe tener dos cifras significativas también, entonces $a = 3.0$ ft/s².

Respuesta:

$3.0$ ft/s²