question 9 of 28. a coconut falls 18 m from the top of a palm tree. how fast will the coconut be traveling…

question 9 of 28. a coconut falls 18 m from the top of a palm tree. how fast will the coconut be traveling when it reaches the ground? (hint: keinitial = 0, pefinal = 0.) a. 19 m/s b. 13 m/s c. 27 m/s d. 9.4 m/s

question 9 of 28. a coconut falls 18 m from the top of a palm tree. how fast will the coconut be traveling when it reaches the ground? (hint: keinitial = 0, pefinal = 0.) a. 19 m/s b. 13 m/s c. 27 m/s d. 9.4 m/s

Answer

Explanation:

Step1: Apply energy conservation

$mgh = \frac{1}{2}mv^2$

Step2: Cancel mass and solve for v

$v = \sqrt{2gh}$

Step3: Substitute g=9.8m/s², h=18m

$v = \sqrt{2\times9.8\times18} \approx 19\ \text{m/s}$

Answer:

A. 19 m/s