Question

Q13. What is the position of the ball at 7.5 sec?

Q14. At what time is the position of the ball equal to 12.5m?

Q15. At what time will the ball reach 20m?

Answer 1

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Answer 2

Speed= postion or distance/ time

In position-time graph, speed is given

by the slope of graph.

By the diagram given in question,

we can conclude that,

Speed= 1/10 m/s = 0.1 m/s

13 ).

The position of the ball at 7.5 sec = 0.1 m/s * 7.5s

= .75 m or 75 cm

14 ). Time at which the position of the ball is equal to 12.5m = 12.5m / 0.1 m/s

= 125 seconds

15 ). Time at which the ball will reach 20m = 20m / 0.1 m/s

= 200 second