Which words are readable red word on white paper in red light or blue words on white paper in blue light

second

Explanation:

the first let's everything appear red, the send would produce black(-ish) words on paper that's appealing blue

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