Gwen releases a rock at rest from the top of a 50-m tower.If g = 9.8 m/s² and air resistance is negligible,what is the speed of the rock as it hits the ground? A) 28 m/s B) 31 m/s C) 56 m/s D) 784 m/s

Question

Quizplus · Accepted Answer

The speed of an object falling freely due to gravity from rest can be found using the equation v = sqrt(2gh), where v is the final velocity, g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the tower (50 m). Plugging in the values, we get:
v = sqrt(2 * 9.8 m/s^2 * 50 m) = 31.3 m/s
Rounding to the nearest whole number, the answer is B) 31 m/s.

Gwen Releases a Rock at Rest from the Top of a 50-M