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प्रश्न
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
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उत्तर
Speed gives an idea of how slow or fast a body is moving.
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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 ?
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 ?
Give one example of a motion where an object does not change its speed but its direction of motion changes continuously.
Give an example of the motion of a body moving with a constant speed but with a variable velocity. Draw a diagram to represent such a motion.
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 car accelerates at a rate of 5 m s-2. Find the increase in its velocity in 2 s.
For the motion with uniform velocity , how is the distance travelled related to the time ?
What are the uses of equations of motion?
