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"Different types of speed's average is c...

"Different types of speed's average is called average speed". Is this true ?

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Explain average velocity and average speed.

Average velocity …... Average speed.

Define : Average speed

Average speed is an average of different speeds.

Give difference between average speed and average velocity.

"The magnitude of average velocity is equal to average speed". This statement is not always correct and not always incorrect. Explain with example,

The magnitude of average velocity is equal to the average speed when a particle moves:-

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km h^(-1). Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km h^(-1). What is the (a) magnitude of average velocity, and (b) average speed of the man over the interval of time (i) 0 to 30 min, (ii) 0 to 50 min, (iii) 0 to 40 min ? [Note: You will appreciate from this exercise why it is better to define average speed as total path length divided by time, and not as magnitude of average velocity. You would not like to tell the tired man on his return home that his average speed was zero !]

KUMAR PRAKASHAN-MOTION IN A STRAIGHT LINE -SECTION-C
  1. What is kinematics?

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  2. In which condition two substance can be considered as a particles ?

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  3. "Different types of speed's average is called average speed". Is this ...

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  4. If direction of velocity and acceleration are in mutually opposite dir...

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  5. When an average velocity of a particle becomes its instantaneous veloc...

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  6. For the given vehicle, its stopping distance is proportional to .........

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  7. Two cars moving with speeds 40 km/hr and 80 km/hr respectively with un...

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  8. When the average acceleration of the particle becomes instantaneous ac...

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  9. Give relation between displacement and path length ?

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  10. What would be the distance covered by the particle falling freely in 1...

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  11. Is it possible for any moving object that velocity is constant but spe...

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  12. "Zero speed and non-zero velocity". Is this statement true or false ? ...

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  13. Speed of moving object can never be negative. Why ?

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  14. "Slope of x tot graph may be negative". Is this true or false ?

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  15. Does displacement depend on the selection of origin of cartasian coord...

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  16. In which situation, distance and magnitude of displacement are same?

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  17. Is it possible for any moving object that speed is constant but veloci...

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  18. Uniform acceleration means constant slope of x tot graph. Is it is tr...

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  19. Two particles A and B are moving on a straight line and B is ahead of ...

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  20. If object starts moving with acceleration beta t, then what will be th...

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