Question 44
Work in pairs. Read the information about the forces acting on vehicles.
When a vehicle travels at a constant speed, the forces from the engine and the frictional forces are balanced. The frictional forces consist of the friction between the tyres and the road, and air resistance. Air resistance opposes movement of any object through the air.
Air resistance
- increases with speed;
- increases with surface area.
With your classmate, answer this question.
When the engine force is greater, the vehicle consumes more fuel. Discuss how changing the shape of vehicles or reducing their speed might reduce the amount of fuel a vehicle consumes.
Share your answers with the class.
When a vehicle travels at a constant speed, the forces from the engine and the frictional forces are balanced. The frictional forces consist of the friction between the tyres and the road, and air resistance. Air resistance opposes movement of any object through the air.
Air resistance
- increases with speed;
- increases with surface area.
With your classmate, answer this question.
When the engine force is greater, the vehicle consumes more fuel. Discuss how changing the shape of vehicles or reducing their speed might reduce the amount of fuel a vehicle consumes.
Share your answers with the class.
