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A jet airplane travelling at the speed o...

A jet airplane travelling at the speed of `500 km h^(-1)` ejects its products of combustion at the speed of 1500 km h–1 relative to the jet plane. What is the speed of the latter with respect to an observer on the ground ?

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1000 km/h
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Knowledge Check

  • A train is moving with a speed of 54 km/h. A monkey is running on the roof of a train against its motion with a speed of 5 ms. w.ut the train. The velocity of the monkey as observed by a man on the ground is :

    A
    `20 ms^(-1)`
    B
    `15ms^(-1)`
    C
    `10ms^(-1)`
    D
    `5ms^(-1)`

  • A car covers (1)/(3) part of total distance with a speed of 20 km h^(-1) and second 1 /3 and the last part with a speed of 60 km h^(1) The average speed of the car is:

    A
    55 km `h^(-1)`
    B
    37.3km `h^(-1)`
    C
    30km `h^(-1)`
    D
    45km `h^(-1)`

  • Rain is falling vertically downwards with a speed of 4 km h^(-1) . A girl moves on a straight road with a velocity of 3 km h^(-1) . The apparent velocity of rain with respect to the girl is :

    A
    3 km `h^(-1)`
    B
    4 km `h^(-1)`
    C
    5 km `h^(-1)`
    D
    7 km `h^(-1)`

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