Boat And Stream

Step 1: Identify the given velocity and force vectors.
Velocity vector: kms Resistive force vector: N
Step 2: Recall the formula for power.
The power is given by the dot product of the force and the velocity: .
Step 3: Perform the dot product.

Step 4: Consider the units.
The unit of force is Newton (N) and the unit of velocity is kms . The unit of power would be N kms . . So, the power is 84 kW. However, if we assume there was a typo and the velocity was meant to be in m s : ms W. Given the options, it is highly likely that the velocity unit should have been m s . Assuming the velocity is in m s , the power of the boat is .