When a carpet is beaten with a stick, dust comes out. Explain why?
When a carpet is beaten with a stick, it comes into motion. But the dust particles continue to be at rest due to inertia and get detached from the carpet.
An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.
A batsman pushes a cricket ball which then roll on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because
(a) the batsman did not hit the ball enough.
(b) velocity is proportional to the force exerted on the ball.
(c) there is a force on the ball opposing the motion.
(d) there is no unbalanced force on the ball, so the ball would want to come to rest.
Why it is advised to tie any luggage kept on the roof of a bus with a rope?
Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
