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A car moving with constant speed of 72 k...

A car moving with constant speed of 72 km h 1 is said to be moving at ......... `ms^(-1).`

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An electric train is moving at the constant speed of 120 km h^(-1). It would have covered ......... km distance in 1 minute.

The speed of a scooter moving with constant speed 10 m s^(-1) is ......... km h ^(-1). (600, 36, 30)

Knowledge Check

  • A car is moving with at a constant speed of 60 km h^(-1) on a straight road. Looking at the rear view mirror, the driver finds that the car following him is at a distance of 100 m and is approaching with a speed of 5 km h^(-1) . In order to keep track of the car in the rear, the driver begins to glance alternatively at the rear and side mirror of his car after every 2 s till the other car overtakes. If the two cars were maintaining their speeds, which of the following statement (s) is // are correct?

    A
    The speed of the car in the rear is 65 km `h^(-1)`.
    B
    In the side mirror, the car in the rear would appear to approach with a speed of 5 km `h^(-1)` to the driver of the leading car.
    C
    In the rear view mirror, the speed of the approaching car would appear to decrease as the distance between the cars decreases.
    D
    In the side mirror, the speed of the approaching car would appear to increase as the distance between the cars decreases.

  • Constant speed oof a train is 54 kim h ^(-1). What is its speed in unit 'ms ^(-1).?

    A
    `15 ms ^(-1)`
    B
    `90 ms ^(-1)`
    C
    `1.5 ms ^(-1)`
    D
    `9 ms ^(-1)`

  • Constant speed oof a train is 54 kim h ^(-1). What is its speed in unit 'ms ^(-1).?

    A
    `15 ms ^(-1)`
    B
    `90 ms ^(-1)`
    C
    `1.5 ms ^(-1)`
    D
    `9 ms ^(-1)`

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    A boy is running on a circular path of radius r at the constant speed 20 ms^(-1), then he is said to perform motion .......... (with constant velocity, with acceleration, with constant acceleration)

    A boy is running on a circular path of radius r at the constant speed 20 ms^(-1), then he is said to perform motion .......... (with constant velocity, with acceleration, with constant acceleration)

    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).

    A train covers 's' distance at the constant speed 30 km h^(-1) Then it covers the same distance in opposite direction at constant speed 45 km h^(-1), then its average speed would be ......... km h ^(-1). (37.5, 36, 25)

    A train covers 's' distance at the constant speed 30 km h^(-1) Then it covers the same distance in opposite direction at constant speed 45 km h^(-1), then its average speed would be ......... km h ^(-1). (37.5, 36, 25)

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