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प्रश्न
What do the following measure in a car ?
(a) Speedometer (b) Odometer
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उत्तर
(a) Speedometer of a car is used to measure the instantaneous speed of the car.
(b) Odometer of a car is used to record and measure the overall distance travelled by the car.
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संबंधित प्रश्न
Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging?
- from A to B and
- from A to C?
In addition to speed, what else should we know to predict the position of a moving body ?
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
What do you mean by motion in one direction?
Express the following in m s-1.
18 km min-1
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.
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Figure shows the displacement of a body at different times .
Calculate the velocity of the body as it moves for time interval :
(i) 0 to 5 s,
(ii) 5 s to 7 s
(iii) 7 s to 9 s.
Define speed of a body.
Which of the following figures (Fig. 8.3) represents uniform motion of a moving object correctly?
