Questions: When a car moves forward, what forces make it to do so? Multiple Choice Gravity. Normal force from the road. Air resistance. Friction (forward direction) between the tires and the road and the engine force.

Solution Steps

To determine which forces contribute to the car moving forward, we need to consider all the forces acting on the car. These include gravity, the normal force from the road, air resistance, and friction between the tires and the road.

• Gravity: This force acts downward and does not contribute to the forward motion of the car.
• Normal Force from the Road: This force acts perpendicular to the road surface and also does not contribute to the forward motion.
• Air Resistance: This force acts opposite to the direction of motion, thus resisting the forward movement of the car.
• Friction (Forward Direction) Between the Tires and the Road and the Engine Force: The frictional force between the tires and the road, combined with the engine force, propels the car forward.

From the analysis, the force that makes the car move forward is the frictional force between the tires and the road, aided by the engine force.

Final Answer