Question

21. A rock is thrown straight down with an initial velocity of 14.5 m/s from a cliff. What is the rock’s displacement after 2.0 s? (Acceleration due to gravity is 9.80 m/s2 .) a. 28 m

b. 49 m
c. 55 m
d. 64 m​

Answer 1

Step-by-step explanation:

d = do + vo t + 1/2 at^2

d = 0 + 14.5 (2) + 1/2 (9.80)(2^2) = 48.6 = ~ 49 m