Question

chapter 3 -
what is the momentum of a 5000kg train moving at a velocity of 40m/s?
1.) what is a force? what units of measurement do we use to measure force?

Explanation:

Step1: Recall the formula for momentum

The formula for momentum ($p$) is given by the product of mass ($m$) and velocity ($v$), i.e., $p = m \times v$.

Step2: Identify the given values

The mass of the train ($m$) is $5000\,\text{kg}$ and the velocity ($v$) is $40\,\text{m/s}$.

Step3: Substitute the values into the formula

Substitute $m = 5000\,\text{kg}$ and $v = 40\,\text{m/s}$ into $p = m \times v$. So, $p = 5000 \times 40$.

Step4: Calculate the product

$5000 \times 40 = 200000$. The unit of momentum is $\text{kg·m/s}$ (kilogram - meter per second).

Answer:

The momentum of the train is $200000\,\text{kg·m/s}$.