A cannon launches a cannonball from level ground with an initial speed of 80 m/s at an angle of 280 above the horizontal. What horizontal distance does the cannonball travel when the cannonball returns to the ground? Given the same initial velocity of launch, at what other angle above the ground can the cannonball be fired and achieve the same horizontal range as before? (Assume that g = 9.81 m/s2.)   a. Range = 540 m, and angle = 420 above the horizontal   b. Range = 600 m, and angle = 620 above the horizontal   c. Range = 270 m, and angle = 620 above the horizontal   d. Range = 540 m, and angle = 620 above the horizontal   e. Range = 270 m, angle = 420 above the horizontal

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Projectile Motion