Question

are there any situations in which we cannot apply Newton ' s laws of motion? is there any alternative for it​

Answer 1

Answer:yes

Explanation: yes it may be possible when reference frame is changed!

Let's say you are sitting inside a moving bus and observing a pendulam to you the pendulam is at rest but to an observer outside the moving bus it look like it is inclined at an angle@ ; To apply newtons law in such cases 1st reference frame must be choosen and an imaganery force pseudo force should be applied opposite to the moving frame to all the objects containing mass and then solve the problems, hope you understood!