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प्रश्न
What are the uses of equations of motion?
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उत्तर
Four variables are present in each equation of motion and if any of three is known to us then fourth can be easily find with the help of these equation of motion.
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संबंधित प्रश्न
A motorcyclist drives from place A to B with a uniform speed of 30 km h-1 and returns from place B to A with a uniform speed of 20 km h-1. Find his average speed.
If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How long does it take to travel 240 m ?
Give an example of motion in which the average speed is not zero but the average velocity is zero.
The velocity-time graph of a moving body is given below in Figure

Displacement in each part AB, BC and CD.
A train is moving with a velocity of 90 km h-1 . It is brought to stop by applying the brakes which produce a retardation of 0.5 ms-2 Find :
(i) The velocity after 10 s , and
(ii) the time taken by the train to come to rest .
What is the relation between distance and time when the body is moving with uniform velocity?
What is the relation between distance and time when the body is moving with variable velocity?
A body projected vertically up with a velocity of 10 m/s reaches a height of 20 m. If it is projected with a velocity of 20 m/s, then the maximum height reached by the body is:
A motorcyclist drives from A to B with a uniform speed of 30 km h–1 and returns back with a speed of 20 km h–1. Find its average speed.
