Assuming no air resistance, how far will a 0.0010 kg raindrop have fallen when it hits the ground 30.0 s later. Assume g = 9.8 m/s2.

a) 294 m

b) 4410 m

c) 8820 m

d) 44,000 km

D = (1/2) ·at²

where d is the distance fallen, a is the acceleration (g in this problem), and t is the time

d = (1/2) · (9.8 m/s²) · (30 s) ² = (1/2) · (9.8) · (900) m

d = 4410 m

The answer is b) 4410 m

Note: the mass of the raindrop is irrelevant since the acceleration due to gravity is independent of mass. (Galileo's Leaning Tower of Pisa experiment)