A car of mass 100kg moves at a constant speed of 20m/s along a horizontal road. What is the power developed by the engine?

Here's the solution for question 3.

3. A car of mass 100kg moves at a constant speed of 20m/s along a horizontal road. What is the power developed by the engine?

When a car moves at a constant speed, its acceleration is zero. This means the net force acting on the car is zero. Therefore, the force developed by the engine must be equal and opposite to the total resistive forces (like friction and air resistance) acting on the car.

The power developed by the engine ($P$) is given by the formula:

$$P = F \cdot v$$

where $F$ is the force exerted by the engine and $v$ is the constant speed of the car.

The problem does not explicitly