Q9 of 17 Page 156

The basic unit of speed is:

i. km/min ii. m/min


iii. km/h iv. m/s

The basic unit to measure time is second and for distance, it is meter. So, the basic unit to measure speed is m/s.


More from this chapter

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7

Show the shape of the distance time graph for the motion in the following cases:

(i) A car moving with a constant speed


(ii) A car parked on a side road

 8

Which of the following relations is correct?

i. Speed = Distance × Time


ii. Speed=


iii. Speed=


iv. Speed=

10

A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:

i. 100 km ii. 25 km


iii. 15 km iv. 10 km

 11

Suppose the two photographs, shown in Fig. 13.1 and Fig. 13.2, had

been taken at an interval of 10 seconds. If a distance of 100 metres is shown by 1 cm in these photographs, calculate the speed of the blue car.