when I receive [shoot]
set [force] to <distance to [mouse pointer]>
set [Xspeed] to (([sin] of (direction)) * (force))
set [Yspeed] to (([cos] of (direction)) * (force))
repeat until <<touching [ wall] ?> or <touching [ object] >> 
change [Yspeed] by (-1)
change x by (Xspeed)
change y by (Yspeed)
end

point in direction ([atan] of ((Xspeed) / (Yspeed)))
if <[Yspeed] < [0]> then
turn cw (180) degrees
end

define (thank you)

set [ THANKS ALOT] to [1000022425845 ]

when [people helping mev] > (999)
say [OMGOMGOMMGM!!!!!1!!!!!!!!!1 THX!]

X-15 wrote:

Cool!

when I receive [shoot]
set [force] to <distance to [mouse pointer v]>
set [Xspeed] to (([sin v] of (direction)) * (force))
set [Yspeed] to (([cos v] of (direction)) * (force))
repeat until <<touching [ wall v] ?> or <touching [ object v] >> 
change [Yspeed] by (-1)
change x by (Xspeed)
change y by (Yspeed)
end

if you also want it to have proper rotation (for example an arrow) add this script in the loop.

point in direction ([atan] of ((Xspeed) / (Yspeed)))
if <[Yspeed] < [0]> then
turn cw (180) degrees
end

Here is a project I made to demonstrate Bow physics , Hope it helps!

(me) say [you awesome!! thanks so much!!!] for (83857345874395734584759857923485) years

say [Beat that LangfordH01] for (479165846598356713571) millenniums

THX

when green flag clicked
say [cool]

when green flag clicked

forever
    
if <key [left arrow] pressed?> then
change x by (-10)    
end
if <key [ right arrow] pressed?> then
change x by (10)
end
end
forever
    
play sound [xylo2]
end

when green flag clicked

set [ THNX] to [320714305443979561085614751459 ]