An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s. The acceleration due to gravity in this unknown planet is
A. g = 20 m s-2
B. g = 25 m s-2
C. g = 15 m s-2
D. g = 30 m s -2
Answer:A
An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s. The acceleration due to gravity in this unknown planet is
A. g = 20 m s-2 B. g = 25 m s-2 C. g = 15 m s-2 D. g = 30 m s -2