A ball is thrown up and attains a maximum height of 100 m, it is thrown upwards with a speed of:
A ball is thrown upward. So,
Initial Speed = u
Distance = s = 100 m
Final Speed = v = 0
Acceleration = a = g = -9.8 ms-2 (negative, since acceleration is opposite the motion)
Now,
u = 44.27 ms-1
Hence, option B is correct.