We can write the law of motion for both trains, calling them train A and train B. Since they both move by uniform motion, so with constant velocity, we can write their position at time t as:
where and
are the average speeds of the two trains. For the train B, we put a negative sign, since it is going in the opposite direction.
We want to know the time t after which the distance between the two trains is 50 km. In equations, this means finding the time t after which
And solving, we find:
Which means after 20 minutes.
Answer:
The pressure is
Explanation:
From the question we are told that
The depth of the swimming pool is
The density of water is
Generally the total pressure exerted on the bottom of the swimming pool is mathematically represented as
Here is the atmospheric pressure with value
So
=>
=>