Answer:
After 90° rotation,
(x,y) ----> (y,-x)
A (-7, 4) ----> A' (4,7)
B (-7, 1 ) ----> B' (1,7)
C (-2 ,1) ----> C' (1,2)
D (-2,4) ----> D' (4,2)
C) 14
Step-by-step explanation:
Option C is the correct answer.
9514 1404 393
5880 J
PE = mgh = (60 kg)(9.8 m/s²)(10 m) = 5880 J
