Question

i need the answer im doing an interm and need to pass

Answer 1

Data:

When you have two variables directly proportional they follows the next:

If the variables are time (t) and speed (s):

$\frac{s_1}{t_1}=\frac{s_2}{t_2}$

Then, if you have:

t1=3

s1=16.5

t2=7

s2=?

$\begin{gathered} \frac{16.5}{3}=\frac{s_2}{7} \\ \\ \frac{7(16.5)}{3}=s_2 \\ \\ s_2=\frac{115.5}{3}=38.5 \end{gathered}$Then, if the object has fallen for 7 second its speed is 38.5m/s