A rock that rolls off the edge of a cliff and falls to the ground will possess which of the following?
1 answer:
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Let's convert the distance in meters first:
The sound wave travels at speed
So we can use the basic relationship between space, time and velocity to calculate the time it takes for the sound to reach our ears:
The sound wave travels at speed
So we can use the basic relationship between space, time and velocity to calculate the time it takes for the sound to reach our ears:
Answer:
R = 1.8 m
Explanation:
This is a simple harmonic movement exercise, at the bottom of the swing the acceleration is vertical upwards and the speed is tangential to the trajectory, that is horizontal; the expression for the centralized acceleration is
= v² / R
R = v² /a_{c}
where the radius is equal to the length of the swing
let's calculate
R = 8.1 / 4.5
R = 1.8 m