Relative speed of Tina with respect to David is given by



now the acceleration of Tina with respect to David



now the relative displacement would be zero when Tina cross David
so now we have



now the speed of Tina at this moment is given as



<em>so the speed will be 52 m/s</em>
Hey there!
The answer to your question is: Iron
There is a very high concentration of iron and other metals in the mesosphere. There is a further buildup of these metals when meteorites burn up in the atmosphere and release such metal atoms.
Thank you!
Answer:Impossible to answer without knowing their actual initial speeds
Explanation:
Given
Ball A launched at angle of 
Ball B is launched at angle of 
At the highest point Ball vertical velocity will be and there will be only horizontal velocity i.e.
and 
where
is the velocity of A & B
thus to find which one is greater we need to know their initial velocity.
It is impossible to know which one have higher velocity at highest point.
Answer:
C. A rocket traveling to the Moon