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Q. A golf ball rolls off a horizontal cliff with an initial speed of 13.9 m/s. The ball falls a vertical distance of 15.0 m into a lake below.

(a) How much time does the ball spend in the air?

(b) What is the speed v of the ball just before it strikes the water?

An airplane with a speed of 33 m/s is climbing upward at an angle of 52° with respect to the horizontal. When the plane's altitude is 540 m, the pilot releases a package.

(a) Calculate the distance along the ground, measured from a point directly beneath the point of release, to where the package hits the earth.

(b) Relative to the ground determine the angle of the velocity vector of the package just before impact. Clockwise from the positive x axis.

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