a car starts from rest and accelerates to a speed of 30 m/s in a time of 3 seconds. the average acceleration of the car is

10m/s²

Explanation:

v=u+at

30=0+a(3)

∴a=10m/s²

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over