Physics XI Content
Laws of Motion-Old is Gold
- State Newton’s Second Law of Motion.
- If action and reaction are always equal and opposite, why don’t they always cancel each other?
- Explain why a cricketer moves his hands backwards while catching ball?
- The leaves fall when a tree is shaken. Give reason.
- Why is it difficult to run fast on sand?
- If a moving bullet striking a block of wood on a frictionless table embeds inside it what happens to the KE of the bullet?
- Is friction a necessary evil? Explain.
- Why do we slip on a rainy day?
- Can a body be regarded in a state of rest as well as in motion at the same time? Give an example.
- Explain how Newton’s first law of motion follows from the second law.
- Why is the kinetic friction less than the limiting friction?
- Explain why a coin placed on a cardboard covering a glass falls into the glass when the cardboard is pulled suddenly to one side?
- Why a man a getting out of a moving bus must run in the same direction for a certain distance?
- When a large heavy truck collides with a passenger car, the occupants of the car are more likely to be hurt than the truck driver. Why?
- Why does a heavy rifle not kick as strongly as a light rifle using the same cartridges?
- It is easier to pull a lawn roller than to push it, why?