A railroad car undergoes an acceleration of 2.00 m/s2 when a net force of 40,000. N acts upon it. What is the mass of the railroad car?

The mass of the railroad car is 20,000 kg

Explanation:

Mechanical Force

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = ma

Where:

a = acceleration of the object.

m = mass.

F = Net force

The railroad car undergoes an acceleration of when a net force of F=40,000 N acts upon it.

It's required to find the mass of the railroad car, which can be done by solving the formula for m as follows:

Substituting:

The mass of the railroad car is 20,000 kg

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2