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A bullet thrown with a hand can be stopp...

A bullet thrown with a hand can be stopped eaisly, but it may kill a person when fired from a gun. Why?

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When a bullet is fired from a gun, its velocity is very large compared to when it is thrown with a hand. When velocity is large, its liner momentum is large. Therefore, it may pierce through the person and kill him.
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PRADEEP-FORCES AND LAWS OF MOTION-SHORT ANSWER QUESTIONS
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  2. Why does a gunman get a jerk on a firing a bullet?

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  3. State the law of conservation of liner momentum.

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  4. Name any two applications of the law of conservation of liner momentum...

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  5. It is easier to push an empty box than to push the box full of books.W...

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  6. When a car rounds a curve suddenly, the person inside is pushed outwar...

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  7. A bullet thrown with a hand can be stopped eaisly, but it may kill a p...

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  8. Show that kg-ms^(-1) and N-s represent the same quantity. Which is tha...

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  9. No force is required to move a body uniformly along a straight line. C...

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  10. A feather of mass 5g is dropped from a height. It is observed to fall ...

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  11. What is force ? What is inertia ? How is inertia measured ?

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  12. Explain what is meant by momentum of a body. Is it a scalar or a vecto...

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  13. Derive the relation F=ma, where the symbols have their usual meanings.

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  14. Discuss briefly Gelileo's ideas about motion.

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  15. State Newton's third law of motion and principle of conservation of mo...

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  16. Eastablish relation between inertia and mass.

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  17. Explain the use of seat belts of cars.

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  18. Explain why a player lowers his hands while catching a cricket ball.

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  19. Why does a gun recoil on firing? Obtain an expression for recoil veloc...

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  20. A car weigh 1500 kg. Its speed time graph is shown in (figure). Calcul...

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