Question

10. Ron’s father finally installed cruise control on their flying car. He was having trouble because he kept of forgetting that he needed to balance out the opposite force of air resistance on the car (FRICTION) with what below?
A) The force of the driver’s foot
B) The forward force applied by the engine
C) The brakes of the car

Answer 1

Air drag is the frictional force which is due to air molecules and it is always opposite to the direction of motion

So here direction of air resistance is always opposite to the motion or velocity

Now if Car is travelling then the force on the car due to engine is always in the direction of velocity of car

Because here engine will provide the force to accelerate the car.

So opposite to that motion there is air resistance.

So here correct answer will be

B) The forward force applied by the engine