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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 2 - Motion in a Straight Line > On a long horizontally moving belt (Fig.), a child runs to and from with a speed 9kmh^−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 4kmh^−1 . For an observer on a stationary platform outside, what is the (a) speed of the child running in the direction of motion of the belt ? (b) speed of the child running opposite to the direction of motion of the belt ? (c) time taken by the child in (a) and (b)

On a long horizontally moving belt (Fig.), a child runs to and from with a speed 9kmh^−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 4kmh^−1 . For an observer on a stationary platform outside, what is the (a) speed of the child running in the direction of motion of the belt ? (b) speed of the child running opposite to the direction of motion of the belt ? (c) time taken by the child in (a) and (b)

A woman starts from her home at 9.00 am and returns home by an auto with a speed of 25 km h^–1. Choose suitable scales and plot the x-t graph of her motion. On a long horizontally moving belt (Fig.) stays at the office up to 5.00 pm walks with a speed of 5 km h^–1 on a straight road up to her office 2.5 km away