A2-kg ball is held 4 m above the ground. relative to the ground its potential energy is

78.4 J

Explanation:

The gravitational potential energy of the ball (relative to the ground) is given by

where

m = 2 kg is the mass of the ball

g = 9.8 m/s^2 is the acceleration due to gravity

h = 4 m is the height of the ball above the ground

Substituting numbers into the formula, we find

yup its correct its: c) b b

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer