An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms-2)
A
3.0s
B
4.5s
C
6.0s
D
7.5s
E
9.0s
Verified Correct Answer: A.
Physical Principles & Numerical Solution
s = ut + \(\frac{1}{2}gt^2\)
45 = 0 + 5t2
t = 3s
Source: Myschool Past Questions Archive (Record #33202)