i have this balloon and stone
balloon is going upwards and stone downward when they collide normally there is nothing wrong but when i tocuh on screen and move balloon to touched location by applying linear impulse this happens
it happens when they are going against each other at a fast speed so it doesn’t happen all the time but i wanna solve this any ideas?
Maybe this will explain better
video
That’s because the rigidbody is moving too fast. This is called tunneling and is a common problem on physics engines. In your rigidbody you can check Bullet to increase the accuracy on collision detection( this consumes performance)
but if this doesn’t help should consider reduce speed or handle this by hand.
ok thanks
checked the bullet and the problem is gone, but new problem occurred now normal collider doesn’t work good. i have arrows and before checking bullet balloon would pop as soon as it touches the arrow head now it’s like very hard to make it pop even if i hit arrow head on purpose do you have any tips other than using joint ?
I don’t understand very well but maybe you are looking something like the ‘stick-arrow’ example here
no i have an arrow which is obvious a rigid body and its only one rigid body so im using normal collider on the head to pop the balloon when it touches it but after checking balloon’s bullet it won’t work even if i hit the head at a fast speed. sometimes work but very rare
the arrow should be bullet
it didn’t work 
ok the solution is very stupid and annoying which is editing the colliders point and putting them a little outside well atleast this works for me but its not fun on my old pc from 2008 thanks anyway