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A yacht moves through water with a force 3160 N from its engine which propels it

Question

3. A yacht moves through water with a force 3160 N from its engine which propels it

eastward. The motion of the boat is opposed by two forces, 1720 N due to the water

and 450 N due to air resistance. Starting from rest the yacht has a velocity of

8.0 knots after 15.0 s. (a) What is the mass of the yacht? (b) What is its

displacement after 15.0 s? 1 knot = 1.15 mph.

Science