A book with a mass of 2.2 kg rests on a table
Find the force of the Earth on the book.

2.2 kg ×10=22 .. "10" is a gravitational field strength

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

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