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Q. The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed?

Q. A projectile is fired horizontally from a gun that is 57.0 m above flat ground; emerging from the gun with a speed of 180 m/s. (a) how long does the projectile remain in air? (b) At what horizontal distance from the firing point does it strike ground? (c) What is the magnitude of the vertical component of its velocity as it strikes ground?

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