Also for collision times that are for objects at same speed, half the distance.
For collisions where they are at different speeds add the speeds up.
1 plane at 500mph another at 400mph, 30 miles apart. How long before they collide.
Add their speeds together to make 900mph.
t= 30/900
simplify...
= 3/90hr
and again..
= 1/30 of an hour
= 2mins
Can anyone go further/elaborate this example, I don't understand the calculation!
Any other examples please?