Which law states that when a carpet is beaten with a stick, dust will come out?
First law of motion
The inertia of an object tends to resist any change in its state of rest or state of motion. When a carpet is beaten with a stick, then it comes in motion. But, the dust particles try to resist their state of rest. According to newton first law of motion, the dust particles stay in a state of rest, while the carpet moves. Hence, the dust particles come out of the carpet.