in my game two objects one is fixed and one objects is moving with learp,when this two object collide with each other, then moved object jumped up to fixed object height. How to solve this problem please help me....

Woah, is that your whole question in the title ?!

$$anonymous$$ake the title a brief description of your problem, something like " when objects collide object jumps to fixed height ", then write the whole story in the large window of Ask A Question

Please edit this question so the title is short and clear, and the problem is described in detail, and your relevant code is added

Also, no-one is going to be able to help you without seeing your code. $$anonymous$$ake sure you format your code when you include it. You can do this by highlighting all your code, then clicking the 10101 button at the top of the edit window =]