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प्रश्न
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
उत्तर
Speed gives an idea of how slow or fast a body is moving.
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संबंधित प्रश्न
During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, 3 × 108m s−1.
Abdul, while driving to school, computes the average speed for his trip to be 20 km h−1. On his return trip along the same route, there is less traffic and the average speed is 30 km h−1. What is the average speed for Abdul’s trip?
State whether speed is a scalar or a vector quantity. Give reason for your choice.
A snail covers a distance of 100 metres in 50 hours. Calculate the average speed of snail in km/h.
The diagram below shows the pattern of the oil on the road at a constant rate from a moving car. What information do you get from it about the motion of the car.
Figure shows the displacement of a body at different times .
Calculate the average velocity during the time interval 5 s to 9 s ,
[Hint : From 5 s to 9 s , displacement = 7 m - 3m = 4m]
Define variable velocity and give one example.
Draw a diagram to show the motion of a body whose speed remains constant, but velocity changes continuously.
A speeding car changes its velocity from 108 kmh−1 to 36 kmh−1 in 4 s. Calculate its deceleration in
- ms−2
- kmh−2.
Which of the following figures (Fig. 8.3) represents uniform motion of a moving object correctly?
