Supposing d(t) is known to have value d,
what procedure will find the time t at which
this happens?

Explanation:

This question assumes uniformly accelerated motion, for which the distance d a particle travels in time t is given by the general equation:

That is a quadratic equation, where the independent variable is the time .

Thus, the procedure that will find the time t at which the distance value is known to be D is to solve the quadratic equation for .

To solve it you start by changing the equation to the general form of the quadratic equations, rearranging the terms:

Some times that equation may be solved by factoring, and always it can be solved by using the quadratic formula:

Where:

That may have two solutions. Some times one of the solution makes no physical sense (for example time cannot be negative) but others the two solutions are valid.

learn it on the intertant so you can solve

b) phosphorus pentoxide