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Explain how friction helps in walking....

Explain how friction helps in walking.

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MBD-MODEL PAPER 1-EXERCISE
  1. Is it possible to accelerate a body if its speed is constant?

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  2. Can a body have zero velocity and still be accelerated?

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  3. Explain how friction helps in walking.

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  4. Express the unit vector hatA mathematical form

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  5. A person sitting in a moving train throws a ball vertically upwards. H...

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  6. A person sitting in a moving train throws a ball vertically upwards. H...

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  7. Is radius of gyration of a body a constant quantity?

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  8. Why cannot we move a finger without disturbing all the stars ?

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  9. Why does the temperature of a gas decrease when it is allowed to expan...

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  10. How does the internal energy of an ideal gas differ from real gas?

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  11. What is the time period of simple pendulum in a spaceship?

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  12. Can specific heat of a gas be negative?

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  13. Name factors which affect the property of elasticity of a solid.

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  14. The magnitude of (hati + hatj) is

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  15. If beta is the angle between (hati + hatj) withhati, then beta is

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  16. The angle between (hati + hatj) and (hati - hatj) is

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  17. Two vectors vecA and vecB have their resultant equal to either of the...

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  18. If vecA.vecB= vecB.vecC when theta1 is the angle between A and B. thet...

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  19. The earth and the moon are attracted to each other by gravitational fo...

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  20. A stone is released from the top of a tower of height 19.6 m. Calculat...

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