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A train covers 's' distance at the const...

A train covers 's' distance at the constant speed of `30 km h^(-1).` Then it covers the same distance in opposite direction at constant speed of `45 km h^(-1),` then its average velocity would be ......... km `h^(-1).`

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KUMAR PRAKASHAN-MOTION -FILL IN THE BLANKS
  1. An electric train is moving at the constant speed of 120 km h^(-1). It...

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  2. A train takes 2 hour to reach Vadodara from Ahmedabad. The same train ...

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  3. A train covers 's' distance at the constant speed of 30 km h^(-1). The...

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  4. The distance covered by a car is known by the instrument ......... fit...

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  5. The speed of a motorcycle is 40 km h^(-1) for first 10 minute and 50 ...

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  6. Acceleration of an object moving with constant velocity is ..............

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  7. The speed of a scooter moving with constant speed 10 m s^(-1) is ........

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  8. The ratio of displacement and distance travelled for a moving body is ...

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  9. A stationary object starts moving. Its displacement is directly propor...

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  10. A boy is running on a circular path of radius r at the constant speed ...

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  11. The slope of graph y-t give the magnitude of .......... (displacement,...

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  12. If for a moving object, the distance-time graph is (half) parabola, th...

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  13. A scooterist is moving with speed 36 km h. When breaks are applied, it...

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  14. The odometer of a car reads 2000 km at the start of a trip and 2400 km...

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  15. A train covers 's' distance at the constant speed of 30 km h^(-1). The...

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  16. A free falling ball is an example of motion. (constant velocity, const...

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  17. An object travels 25 m in 4s on a linear path and then another 50 m in...

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  18. Mahesh goes for morning walk along a semicircular path of 70 m radius....

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  19. ......... is not a vector quantity. (Speed, Velocity, Displacement)

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  20. Velocity of a bus moving on a linear path with 10 ms^(-1) increases to...

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