# Physics

Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. What average power must the winch supply in order to accelerate a 163-kg ultralight glider from rest to 27.9 m/s over a horizontal distance of 46.8 m? Assume that friction and air resistance are negligible, and that the tension in the winch cable is constant.

1. 👍 0
2. 👎 0
3. 👁 634
1. power=1/2 m 27.9^2 /time

where time= distance*2/27.9

1. 👍 1
2. 👎 0

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