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

always use significant figure rules. remember that these rules apply to all numbers that are measurements. a penny falls from a windowsill which is 25.0 m above the sidewalk. how much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground? s 2.26 1.0 5.10

always use significant figure rules. remember that these rules apply to all numbers that are measurements. a penny falls from a windowsill which is 25.0 m above the sidewalk. how much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground? s 2.26 1.0 5.10

Answer

Explanation:

Step1: Identificar la ecuación

Utilizamos la ecuación $h = v_0t+\frac{1}{2}gt^2$. Dado que la moneda cae desde el reposo, $v_0 = 0$. Entonces la ecuación se convierte en $h=\frac{1}{2}gt^2$.

Step2: Despejar el tiempo

Despejando $t$ de $h=\frac{1}{2}gt^2$, obtenemos $t=\sqrt{\frac{2h}{g}}$. Sabemos que $h = 25.0$ m y $g = 9.8$ m/s².

Step3: Calcular el tiempo

Sustituimos los valores: $t=\sqrt{\frac{2\times25.0}{9.8}}=\sqrt{\frac{50.0}{9.8}}\approx\sqrt{5.102}\approx 2.26$ s.

Answer:

2.26 s