The correct answer is: C. Speeds lower than equilibrium speed.
Cant deficiency is a condition that occurs when a vehicle travels around a curve at a speed that is lower than the equilibrium speed. This can cause the vehicle to lean inward towards the center of the curve, which can lead to loss of control and a possible accident.
The equilibrium speed is the speed at which a vehicle will travel around a curve without leaning inward. This speed is determined by the radius of the curve, the coefficient of friction between the tires and the road, and the mass of the vehicle.
When a vehicle travels at a speed lower than the equilibrium speed, the centrifugal force acting on the vehicle will be greater than the centripetal force acting on the vehicle. This will cause the vehicle to lean inward towards the center of the curve.
If the vehicle leans inward too much, it may lose control and skid off the road. This is why it is important to travel at a speed that is greater than the equilibrium speed when driving around a curve.
Here is a brief explanation of each option:
- Option A: Equilibrium speed. This is the speed at which a vehicle will travel around a curve without leaning inward. It is determined by the radius of the curve, the coefficient of friction between the tires and the road, and the mass of the vehicle.
- Option B: Speeds higher than equilibrium speed. When a vehicle travels at a speed higher than the equilibrium speed, the centrifugal force acting on the vehicle will be less than the centripetal force acting on the vehicle. This will cause the vehicle to lean outward away from the center of the curve.
- Option C: Speeds lower than equilibrium speed. This is the correct answer. When a vehicle travels at a speed lower than the equilibrium speed, the centrifugal force acting on the vehicle will be greater than the centripetal force acting on the vehicle. This will cause the vehicle to lean inward towards the center of the curve.
- Option D: Booked speed. This is the speed that is recommended by the manufacturer of the vehicle. It is usually based on the maximum speed that the vehicle can safely travel.