A boat of mass experiences a water resistance of opposite to its motion

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A boat of mass

200\,\text{kg}

experiences a water resistance of

40\,\text{N}

opposite to its motion. The rower pushes the water backward with an average force of

250\,\text{N}

. Determine the acceleration of the boat at that instant.