Please change to 3rd pov Place the ruler along the length of the book starting from the zero mark of the ruler.
Record the length of each book in a suitable table.
Repeat step 2-5 for each book
Find the average length of the four books

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

which three statements are true about all alloys?

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.