A 1200-kg cannon shoots a 28-kg shell at an angle of 25deg, Ask an Expert

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A 1200-kg cannon shoots a 28-kg shell at an angle of 25° above the horizontal and a speed of 470 m/s. What is the recoil velocity of the cannon? (Take the direction the cannon is firing to be the positive direction. Indicate the direction with the sign of your answer.)

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