The problem in physics (section 1) №013

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Cannon rigidly mounted on a railway platform, it produces a shot along the railway line at an angle a = 300 to the horizon line. To determine the rate rollback platform if the projectile flies at a speed u1 = 480 m / s. Weight of instrument platforms and shells m2 = 18 tonnes, the weight of the projectile
m1 = 60 kg.

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