Batman drops his keys off a building that is 100 m tall and they fall straight down. he throws his grappling hook straight down 1 second after the keys fall to try to catch them. the initial velocity of the keys is 0 m/s and the initial velocity of the grappling hook is 10 m/s. when does the grappling hook catch the keys? (assume that the grappling hook is a simple projectile)

After 1 second of drop the keys will go down by distance

speed of the keys after t = 1 s

now the relative speed of drap with respect to key is given as

now the time taken by the drap to cover the distance between them

in this time the key will drop to the position

so it shows larger then the height of the building

So here the drap will not able to catch the keys

close lines strong magnet less close weaker

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this