Question 41
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.
What happens to the speed of the vehicle if the engine force is greater than the frictional forces?
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.
What happens to the speed of the vehicle if the engine force is greater than the frictional forces?
Share your answers with the class.
