ch06-p061 - 61. The layer of ice has a mass of mice = ( 917...

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61. The layer of ice has a mass of () 35 ice 917 kg/m (400 m 500 m 0.0040 m) 7.34 10 kg. m × = × This added to the mass of the hundred stones (at 20 kg each) comes to m = 7.36 × 10 5 kg. (a) Setting F = D (for Drag force) we use Eq. 6-14 to find the wind speed v along the ground (which actually is relative to the moving stone, but we assume the stone is moving slowly enough that this does not invalidate the result):
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