Its due to moment of force. Explanation: Possibility of breaking the branch increases when a person goes to the tip of the branch due to moment of force. Due to moment of force, branch tend to bend downward when we go at the tip of branch.
V (speed) = F (frequency) x Wavelength If we rearrange the formula, making frequency the subject; F (frequency) = Speed ÷ Wavelength F = 300,000 m\s x 4.5 e -10m F = 0.08810409956 Hz
