a nut is rusted and jammed. we have two wrenches one of 10 cm and another of 20 cm. which wrench is preferred to unscrew the nut ? give reason also​

Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s.assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.