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 189-kg ultralight glider from rest to 20.5 m/s over a horizontal distance of 52.2 m? Assume that friction and air resistance are negligible, and that the tension in the winch cable is constant.
the formula for power = Work/ time
the formula for work = force x distance
The Attempt at a Solution
work= force x distance
= 189 x 9.8 x 52.2
then to find power= 96684.84 / time ?
do I use the velocity to find the time?
so it would be t= 52.2m/20.5 m/s
= 2.54 seconds?
is this correct? i'm confused as how to do this