You have 3 balls at the same height. 1 is throws at 45 degrees, 1 is thrown horizontally, 1 is thrown, 1 is thrown at -45 degrees. rank them by the magnitude of their vertical component of velocity right before they hit the ground.

So vertical velocity of ball first and third are same and of ball third less than first and second

Explanation:

Let the actual velocity of all balls are v

We have given three balls are thrown are different angle

First is thrown at an angle of 45 degree

So vertical velocity

Second ball is thrown horizontally

So vertical velocity

Now last ball is thrown is at an angle of -45 degree 'So vertical velocity

Which magnitude is equal to 0.707 v

So vertical velocity of ball first and third are same and of ball third less than first and second

answer///scientific method;