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A train covers the first half of the dis...

A train covers the first half of the distance between two stations at the speed of `40 km h^-1` and the other half `60 km h^-1`. Its average speed is

A

`52 km h^-1`

B

`50 km h^-1`

C

`48 km h^-1`

D

`42 km h^-1`

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TARGET PUBLICATION-Motion in a plane-Exercise
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  2. A body covers one-half of its journey at 40 m s^-1 and the next half ...

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  3. A train covers the first half of the distance between two stations at ...

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  4. The position of an object moving along x-axis is given by x = a + bt^2...

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  5. An electron travelling with a speed of 5x 10^3 m/s passes through an e...

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  6. An aeroplane takes off the ground after covering distance of 800 m of ...

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  7. A bullet strikes a plank of thickness 5 cm with a velocity of 1000 m/s...

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  8. A local train, travelling at 72 km/hr is brought to rest in 10 seconds...

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  9. The v-t graph of an athlete is shown below. The distance travelled by ...

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  10. A body projected vertically upwards with a velocity of u returns to th...

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  11. A body released from rest to fall freely under gravity reaches the gro...

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  12. A stone is thrown vertically upwards with initial velocity of 14 m s^-...

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  13. A man swims relative to water with a velocity greater than velocity of...

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  14. Two trains A and B are moving on parallel tracks with velocities 60 km...

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  15. If a car travelling at 58 km/h overtakes another car travelling at 40 ...

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  16. A thief is running away on a straight road in jeep moving with a speed...

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  17. If a car travelling at 58 km/h overtakes another car travelling at 40 ...

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  18. The two dimensional motion of a body in which a vertical motion with c...

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  19. Which of the following is NOT an example of a projectile?

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  20. The path followed by projectile is called

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