laws of motion set1

Question

1. What is law of inertia? What are its types?
2. Is force required to keep a body in motion?
3. How Galileo concluded law of inertia? Discuss those experiments. (Inclined plane exp.)
4. State Newton's first law of motion.
5. What is momentum? Its SI unit. Is it a scalar or a vector quantity?
6. Which object is easier to stop?
7. Which object has larger momentum?
   (i) A 1000 kg truck moving very slowly
   (ii) A football moving very fast.
8. Which object has a larger momentum?
9. (i) Two objects of same mass but B has larger velocity than A.

(ii) Two objects of same velocity but mass of B is double as of A.

(iii) Two objects have game K.E. but mass of (B) is double from (A).

10. What is change in the momentum called?
11. State Newton's 2nd law of motion. write it's mathematical form.
12. Show that if (m) is constant F=ma.
13. How can you prove 1st law from it?