The model of the drawstring boat is a mechanical model. In this model, the ship is subjected to buoyancy, friction, water resistance and external pull, so the acceleration of this model needs to be calculated according to the resultant force of the above forces. First of all, we should analyze the various forces acting on the model. Buoyancy is an important force of a ship in water, which is opposite to gravity and equal to the displacement of water, and can be calculated by Archimedes principle. Friction and water resistance are the resistances that the ship receives in the process of motion, and their action direction is opposite to the ship's motion direction, which can be approximately calculated according to the ship's speed, friction coefficient, fluid density and viscosity. The externally introduced pulling force is consistent with the moving direction of the ship, and its magnitude depends on the pulling force and the contact mode between the rope and the ship.

According to Newton's second law, force is equal to mass multiplied by acceleration, and the resultant force of the above forces multiplied by the mass of the ship can get the acceleration of the ship. How to solve the resultant force of various forces needs to be analyzed according to the specific situation. For example, if the pulling force on the ship is greater than the combined force of resistance and friction, the ship will accelerate; If the pulling force is less than the combined force of resistance and friction, the ship will slow down or stop.

In addition to the above forces, environmental factors may also affect the acceleration of the ship model with rope. For example, if a ship moves in turbulent waters, it may be subjected to greater resistance, thus affecting its acceleration.

The acceleration calculation of the towing ship model can help us to better study the ship's motion and its influencing factors, which has important reference value for the research in navigation, transportation and other fields.