A ball of mass 0.8 kg is dropped from a height, H. Just b...
A ball of mass 0.8 kg is dropped from a height, H. Just before hitting the ground, its velocity is 5.0 m/s. Determine H.
[g = 10 ms-2]
1.25m
4.00m
6.25m
1.60m
Correct answer is A
u = 0, g = 10 ms2, v = 5 m/s, h = ?
From v2=u2+2gh
⇒ 52=02+2×10×h
25 = 0 + 20h
25 = 20h
Therefore, h = 2520 = 1.25m