When a racing car with a partially filled fuel tank moves in the horizontal direction at a uniform acceleration equal to g, the free surface of the liquid fuel in the tank will assume a slope. This phenomenon is known as the "Sloshing effect". The sloshing effect occurs due to the inertia of the liquid fuel in the tank. The liquid fuel in the tank tends to remain in its state of motion due to its inertia.


There are various factors which affect the sloshing effect in a fuel tank. Some of them are:

- Acceleration of the vehicle
- Shape and size of the tank
- Quantity of fuel in the tank
- Viscosity of the liquid fuel


The slope of the free surface of the liquid fuel in the tank is directly proportional to the acceleration of the vehicle. As the acceleration of the vehicle increases, the slope of the free surface also increases. The free surface of the liquid fuel in the tank tends to move towards the rear end of the tank as the vehicle accelerates. This phenomenon is known as the "Forward Surge".


In conclusion, the sloshing effect is a common phenomenon in fuel tanks of vehicles. The slope of the free surface of the liquid fuel in the tank depends on various factors such as the acceleration of the vehicle, shape and size of the tank, quantity of fuel in the tank, and viscosity of the liquid fuel. It is important for vehicle designers to consider the sloshing effect while designing fuel tanks to ensure the safety and stability of the vehicle.

45 is the correct answer
tanA=a/g
a=g given
tanA=1
A=45