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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
In addition to speed, what else should we know to predict the position of a moving body ?
A motorcyclist starts from rest and reaches a speed of 6 m/s after travelling with uniform acceleration for 3 s. What is his acceleration ?
The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey ?
When is a body said to be in motion?
Give one example of following motion :
Uniform velocity
Give one example of following motion :
Variable velocity
A car travels the first 30 km with a uniform speed of 60 km h−1 and the next 30 km with a uniform speed of 40 km h−1. Calculate :
- The total time of journey,
- The average speed of the car.
A train travels with a speed of 60 km h-1 from station A to station B and then comes back with a speed 80 km h-1 from station B to station A. Find -
- The average speed
- The average velocity of the train.
Draw a diagram to show the motion of a body whose speed remains constant, but velocity changes continuously.
