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A motor vehicle travelled the first thir...

A motor vehicle travelled the first third of a distance s at a speed of `v_(1)=10 kmph` , the second third at a speed of `v_(2)=20kmph` and the last third at a speed of `v_(3)=60kmph` Determine the mean speed of the vehicle over the entire distances .

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The correct Answer is:
18 kmph
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A motor vehicle travelled the first third of a distance s at a speed of v_(1)=10 kmph, the second third at a speed of v_(2) =20 kmph and the last third at a speed of v_(3)=60 kmph determine the mean speed of the vehicle over the entire distances.

A motor vehicle travelled the first third of a distance s at a speed of v_1 =10 kmph, the second third at a speed of v_2 =20 kmph and the last third at a speed of v_3 =60 kmph. Determine the mean speed of the vehicle over the entire distance s.

AAKASH SERIES-MOTION IN A STRAIGHT LINE-EXERCISE (LEVEL 1)
  1. A motor vehicle travelled the first third of a distance s at a speed o...

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  2. A particle starts from rest and accelerates as shown in the graph. Det...

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  3. Determine the mean velocity and the mean acceleration of a point in 5...

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  4. A motorist drives north for 35.0 minutes at 85.0 km//hand then stops f...

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  5. Find the average velocity in the time intervals (a)0 to 2s,(b)0 to 4s...

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  6. Find the average velocity for the time intervals Deltat=t(2)-0.75 when...

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  7. Velocity of particle at time t=0is 2ms^(-1). A constant acceleration o...

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  8. A car moving on astringt road accelerates from a speed of 4.1 m//s to...

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  9. A bullet moving with speed 1.50 m//s strikes a tree and penetrates 3.5...

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  10. Graph of velocity (v) versus time 't' for motion of a motorbike which ...

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  11. A girl is standing on the top edge of an 18 m high building . She toss...

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  12. A ball is thrown stright upwards with a speed v from a point h meter a...

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  13. A stone is dropped from top of a cliff . It is seen to hit the ground ...

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  14. If an object reaches a maximum vertical height of 23.0 m when thrown v...

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  15. A stone is thrown vertically upward with a speed of 10.0ms^(-1)from th...

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  16. A ball is dropped freely from rest. If it travels a distance 55m in th...

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  17. An object that is dropped freely from rest travels for 5 seconds. What...

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  18. A ball is vertically projected with an initial velocity of 40ms^(-1) ....

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  19. An object is vertically projected with an initial velocity of 20ms^(-...

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  20. A stone is thrown vertically upward with an initial velocity of 10ms^(...

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