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An object of mass 3.5 kg is dropped from a three-story building of hight 49 m....

An object of mass 3.5 kg is dropped from a three-story building of hight 49 m. It strikes the ground after certain time. What magnitude of the impulse does gravity give to the object (in N.s) from the instant it is dropped until it hits the ground (Assuming no air resistance).

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