A car begins from rest on a long straight road. The engine of the car exerts a constant driving force. The diagram illustrates the horizontal forces acting on the car. The resistive forces are proportional to the car’s speed. Why does the car finally attain a maximum speed?
- AThe resistive forces decrease to make the acceleration of the car negative.
- BThe resistive forces decrease to make the acceleration of the car zero.
- CThe resistive forces increase to make the acceleration of the car negative.
- DThe resistive forces increase to make the acceleration of the car zero.