A 500- kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, applying a constant force to the sail. At the end of an 10- s run, the acceleration is 0.5 m/s2.
What was the acceleration at the beginning of the run?
What was the force due to the wind?
What retarding force must be applied at the end of 3 s to bring the ice boat to rest by the end of the next 3 s? (The wind is still blowing. Assume the boat was at rest at time t = 0.)