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77.A pebble is thrown vertically upwards from abridge with an initial velocity of 4.9 m/s. Itstrikes the water after 2 s. The height of thebridge is:(1) 19.6m(2) 14.7m(3) 9.8m(4) 4.9m​

Answer»

Answer:

9.8 is the HEIGHT of the BRIDGE

Explanation:

4.9×2=9.8

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