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प्रश्न
When is a body said to be in motion?
उत्तर
A body is said to be in motion if it changes its position with respect to its immediate surroundings.
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संबंधित प्रश्न
Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
Under which condition is the magnitude of average velocity equal to average speed ?
What is the SI unit of retardation ?
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
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 :
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Give one example of following motion :
Variable velocity
A train takes 2 h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200 km. Find:
The average speed,
The average velocity of the train.
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:
- the speed of car in m s-1
- the retardation and
- the speed of car after 2 s of applying the brakes.
Define variable velocity and give one example.
