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On a long horizontally moving belt (Fig.), a child runs to and fro with a speed 9 km h^–1 (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4 km h^–1. (b)

Q 3.25 On a long horizontally moving belt (Fig.), a child runs to and fro with a speed 9 km h-1 (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4 km h-1. For an observer on a stationary platform outside, what is the 

(b) speed of the child running opposite to the direction of motion of the belt?

 

 

Answers (1)
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S Sayak

(b) Speed of the child with respect to the stationary observer when the boy is running in the direction opposite to the motion of the belt = 9 - 4 = 5 km h-1

      

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