Answer:
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Explanation:
1. Fall time
<u>i) Find the vertical speed of the plane when the tanks were released</u>

That is the same initial vertical speed of the tanks.
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<u>ii) Find the fall time</u>




Only the positive value has aphysical meaning: t = 2.26 seconds.
2. Speed when they hit the ground
<u>i) The horizontal speed is constant:</u>

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<u>ii) The vertical speed is:</u>


<u>iii) Total speed</u>


3 is 3, 4 is 3, 5 is 3, 6 is false, 7 is true, 8 is false, 9 is false, 10 is 3
W = m g weight of drop
W = q E
m = q E / g = = 3 e E / g
m = 3 * 1.6E-19 * 1.4E4 / 9.8 = 6.96E-16 kg
The answer is the first one a