A pot falls from a ledge and hits the ground 45 m below.The speed with which it hits the ground is
A)about 30 m/s.
B)about 60 m/s.
C)about 120 m/s.
D)more than 120 m/s.

Question

Quizplus · Accepted Answer

We can use the kinematic equation to solve for the final velocity:
final velocity² = initial velocity² + 2acceleration(change in height)
Since the pot is initially at rest (zero initial velocity) and acceleration due to gravity is approximately 9.81 m/s², we can simplify the equation to:
final velocity² = 2 × 9.81 m/s² × 45 m
final velocity² = 882.9 m²/s²
final velocity ≈ 29.7 m/s
Therefore, the speed with which the pot hits the ground is about 30 m/s, which is the closest choice.

A Pot Falls from a Ledge and Hits the Ground