B) A given vector is represented with an arrow in figure 1.1. State the direction of force and convert the force into Cartesian format. (3 marks) c) A body of mass 10 kg is dropped from a height of 20 m. Calculate;
i) The velocity before heating the ground. (1 mark)
ii) The kinetic energy by the time of heating the ground. (2 marks)
d) Calculate the refractive index of water given that the velocity of light through water is .

answer; ///i do believe that the correct answer is ; ///(physical change);

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .