A sports car speeds up ouch faster than a
dump truck when a traffic light turns from
red to green.

A Sports car speeds up faster than a dump truck, when a traffic light turns from red to green , due to Newton's second law of motion.

Explanation:

Newton's  2nd law of motion states that the acceleration of an object depends on the mass of the object and the amount of force applied.

In this case, A sports car is lighter and less bulky than a dump truck .It has low mass. The acceleration is more for a race car than a dump truck.

This is the reason that a sports car speeds up much faster than a dump truck when a traffic light turns from red to green. It has more force than the dump truck.

d) the number of neutrons plus the number of protons

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