Question

Can any one tell me what equation i need to solve this or the answer

A cat falls from a table of height 1.3 m. What is the impact speed of the cat?

A. 5.0 m/s
B. 7.5 m/s
C. 2.5 m/s
D. 25.5 m/s

Answer 1

for any object in free fall, if it falls from rest, you can write the vertical position \(y\), and the vertical velocity \(v\) as:
\[y=y_0-\frac{1}{2}gt^2\]
\[v=-gt\]
to find the impact time and velocity you must set \(y=0\) and solve for \(t\), then use that value of \(t\) to find the velocity at the impact.