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1) An artillery shell is launched on a flat, horizontal field at an angle of α...

1) An artillery shell is launched on a flat, horizontal field at an angle of α = 44.2° with respect to the horizontal and with an initial speed of v0 = 258 m/s.

a) What is the horizontal distance covered by the shell after 7.67 s of flight?

b)What is the height of the shell at this moment?

2) A boy standing on top of a building throws a small ball from a height of H1 = 39.0 m. The ball leaves with a speed of 12.5 m/s, at an angle of 65.0 degrees from the horizontal, and lands on a building with a height of H2 = 15.0 m. Calculate for how long the ball is in the air. (Neglect air friction, and use g = 9.81 m/s2.)

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