Saturday

December 20, 2014

December 20, 2014

Posted by **Eleni** on Saturday, February 1, 2014 at 11:43am.

What is the initial speed of the cork, as seen by your friend on the ground?

B)What is the initial direction of the cork as seen by your friend? Give your answer as an angle relative to the horizontal.

C)Determine the maximum height of the cork above the ground.

D)How long does the cork remain in the air?

- physics -
**Steve**, Saturday, February 1, 2014 at 12:03pminitial speed is √(2.5^2 + 5.7^2)

The direction is problematical, depending on where the friend stands. If directly below the balloon, its direction appears horizontal. If sufficiently far to the side, then it will appears as being at an angle θ such that tanθ = 2.5/5.7

h = 6.4 + 2.5t - 4.9t^2

find the vertex of that parabola for max height

solve for h=0 to find the time in the air.

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