If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
A
90 m
B
30 m
C
45 m
D
60 m
Verified Correct Answer: C.
Physical Principles & Numerical Solution
S = (1)/2gt2
S = (1)/2 x (10)/1 x 32 =5 x 9 = 45 m
Source: Myschool Past Questions Archive (Record #14351)