Question

The distance-time graphs below represent the motion of a car. Match the descriptions with the graphs. Explain your answers
1. the car is stopped
2. the car is traveling at a constant speed
3. the speed of the car is decreasing
4. The car is coming back

Answer 1

CADB are the answer
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Answer 2

Matching the Descriptions with the Distance time graphs

1. The car is stopped  :  Graph C
2. The car is travelling at a constant speed : Graph A
3. The speed of the car is decreasing : Graph D
4. The car is coming back :  Graph B

From the first graph as the car is stopped the distance travelled by the car will remain constant while the wait  time will be infinitesimal because is never constant

The second graph shows that the distance travelled by the car is directly proportional to the time as speed = distance / time . therefore the speed is constant .

When the car is deaccelerating, the speed of the car will start decreasing therefore the distance travelled by the car will also decrease.

The emerging curve in the fourth graph shows a change in direction of the car therefore the graph shows that the car is coming back.

Hence we can conclude that matching each graph The car is stopped  :  Graph C, The car is travelling at a constant speed : Graph A, The speed of the car is decreasing : Graph D, the car is coming back :  Graph B

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