9th Forces and Laws of motion teat paper

Forces and Laws of motion teat paper 

1. Why do passengers tend to fall sideways when the bus takes a sharp u turn?
2. Why should a passenger hold on to prevent himself from swaying in a turning bus?
3. Why do passengers tend to fall back when it starts suddenly?
4. Why do passengers jumping out of a rapidly moving bus fall forward with his face downwards, if he does not run forward?
5. Why does a passenger jumping out of a rapidly moving bus fall forward with his face downwards?
6. Why can dust be removed by shaking it, or beating it by a carpet?
7.  Why does a bullet when fired against a glass window pane make a hole in it, and the glass pane will smash it?
8. Why does an athlete take a longer jump if he comes running from a distance than when he jumps suddenly from the take-off line?
9. What happens when you shake a wet piece of cloth? Explain, why?
10. Why is it advised to tie a rope on the luggage while you travel by the bus?
11. How does a boat move forward into the water when the boatman presses one end of the pole against the ground?
12. Why is it difficult for a fireman to hose, which ejects large amount of water at a high velocity?