Question

an object starts from rest and falls freely. What is the velocity of the object at the end of 9.00 seconds?

Answer 1

V@9sec = g * 9
where g = 9.8 m/sec (acceleration due to gravity)

from the relation : v=u + a*t

Answer 2

\[v_f = v_i + at\]
\[v_f = 0 + 9.8\frac{m}s \times 9s\]

Answer 3

88.2 m/s2

Answer 4

Well, technically it would be 88.2 m/s... Because it's 9.8 m/s^2 * 9 seconds... so one of the seconds cancels out, leaving the 88.2 m/s.