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When is a Body Said to Be in Motion? - Physics

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प्रश्न

When is a body said to be in motion?

एक पंक्ति में उत्तर
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उत्तर

A body is said to be in motion if it changes its position with respect to its immediate surroundings.

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अध्याय 2: Motion in One Dimension - Exercise 2 (A) [पृष्ठ ३५]

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सेलिना Concise Physics [English] Class 9 ICSE
अध्याय 2 Motion in One Dimension
Exercise 2 (A) | Q 4 | पृष्ठ ३५

संबंधित प्रश्न

Change the speed of 6 m/s into km/h.


A ball hits a wall horizontally at 6.0 m s-1. It rebounds horizontally at 4.4 m s-1. The ball is in contact with the wall for 0.040 s. What is the acceleration of the ball ?


Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.


A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s)              :     0          2         4          6       8         10
Speed (m/s)       :     4          8       12        16     20         24
Draw the speed-time graph by choosing a convenient scale. From this graph :

(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.


The speed of a moving object is determined to be 0.06 m/s. This speed is equal to :


Give one example of following motion :

Variable velocity


A car travels the first 30 km with a uniform speed of 60 km h1 and the next 30 km with a uniform speed of 40 km h1. Calculate :

  1. The total time of journey,
  2. The average speed of the car.

A car is moving in a straight line with speed 18 km h-1. It is stopped in 5 s by applying the brakes. Find:

  1. the speed of car in m s-1
  2. the retardation and
  3. the speed of car after 2 s of applying the brakes.

Define uniform velocity and give one example.


What is the relation between distance and time when the body is moving with uniform velocity?


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