Question

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?

Answer 1

The mass of the railroad car is 20,000 kg

Step-by-step 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
`a=2\ m/s^2` 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:

`\displaystyle m=(F)/(a)`

Substituting:

`\displaystyle m=(40,000)/(2)=20,000`

The mass of the railroad car is 20,000 kg