Which of the two forces: 4 kN or 800 N is large and how many times?

Which of the two forces: 4 kN or 800 N is large and how many times? The volume of gasoline in the tank of a car has decreased by 2 times. How did the weight of gasoline change?

First task:

Given:

F1 = 4 kN – first force;

F2 = 800 Newton – the second force.

It is required to determine which of the forces is greater.

To determine which of the forces is greater, it is necessary to bring both forces to the same units of measurement.

F1 = 4kN = 4 * 1000 = 4000 Newtons.

Since 4000> 800, the first force is greater.

Answer: a force of 4kN is greater than a force of 800 Newton.

Second task:

Given:

V1 = 2 * V2 – the volume of the tank in the car has decreased by 2 times.

It is required to determine the change in the weight of gasoline P2 / P1.

P2 / P1 = m2 * g / m1 * g = m2 / m2, where m2 and m1 are the masses of gasoline in the tanks;

P2 / P1 = m2 / m1 = ro * V2 / (ro * V1), where ro is the density of gasoline;

P2 / P1 = V2 / V1 = V1 / (2 * V1) = 1/2 = 0.5.

Answer: the weight of gasoline has decreased by 0.5 times.