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The speed-time graph for a car is shown is Fig. 8.12. (a) Find out how far the car travels in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car?

Ans: (a) Distance travelled by car in first 4 second = area of speed-time graph = 1/2 × 4 × 6 = 12m

The shaded area which is equal to represents the distance travelled by the car in the first 4 s.

(b) The part of the graph in red colour between time 6 s to 10 s represents uniform motion of the car, as speed does not change in this duration.

The speed-time graph for a car is shown is Fig. 8.12. (a) Find out how far the car travels in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car?

Other NCERT Questions

A driver of a car travelling at 52 km/ h applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km/ h in another car applies his brakes slowly and stops in 10 s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?

Fig 8.11 Shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions: (a) Which of the three is travelling the fastest? (b) Are all three ever at the same point on the road? (c) How far has C travelled when B passes A? (d)How far has B travelled by the time it passes C?

The speed-time graph for a car is shown is Fig. 8.12. (a) Find out how far the car travels in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period. (b) Which part of the graph represents uniform motion of the car?

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