A boat moves through the water at a constant velocity of 7.8 m/s with two forces acting on it. One is a 2.21 ✕ 103 N forward push by a motor. (a) What is the force of the water on the boat? (b) What is the net force acting on the boat?  N (c) What will its speed be at the end of 3 s?  m/s

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Q: A boat moves through the water at a constant velocity of 7.8 m/s with two forces acting on it. One…

A: Speed of the boat is u = 7.8 m/s Forward push by the motor is F = 2.21 x 103 N

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A: Visualize the Problem:

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”