Suppose a runaway shopping cart in a parking lot strikes another cart with 15 J of kinetic energy. What
is the maximum amount of kinetic energy the second
cart could have as a result of the collision?

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

in physics zero. in muscle fatigue could be high