Afootball is kicked straight up into the air; it hits the ground 4.0 s later. what was the greatest height reached by the ball? assume it is kicked from ground level. express your answer with the appropriate units.

the greatest height at which the ball can reach is 19.62 m.

Explanation:

given,

time taken by the ball to reach the ground = 4 s

time at which ball reach at maximum height = 4/2 = 2 s

velocity of the ball at the top most point = 0 m/s

we know,

v = u + a t

0 = u + (-9.81 ) × 2

u = 19.62 m/s

maximum height achieved

s = 19.62 m

hence, the greatest height at which the ball can reach is 19.62 m.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.