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I have this homework i need help with ?Part (a)

I Have This Homework I Need Help With Part A class=

Sagot :

Given that the mass of train is

[tex]m=\text{ }8.12\times10^6\text{ kg}[/tex]

The deceleration of the train is

[tex]\begin{gathered} a\text{ = -104 km/h} \\ =-104\times\frac{5}{18} \\ =\text{ -28.88 m/s} \end{gathered}[/tex]

The braking force can be calculated by the formula

[tex]F=ma[/tex]

Substituting the values, the braking force will be

[tex]\begin{gathered} F=8.12\times10^6\times(-28.88) \\ =2.348\times10^8\text{ N} \end{gathered}[/tex]

Thus, the braking force is 2.348 x 10^8 N.

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