If gravity is the only force present, what is the total mechanical energy of a glass of milk falling off a table at a time when its potential energy is 15 J and
its kinetic energy is 12 J?
O A. 120
B. 27 J
O C. 33
O D. 153

B

Step-by-step explanation:

Em = Ec + Ep

Em = 12 + 15 = 27 J

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)