The EF Express, a train with 5 locomotives and 60 freight cars, is going down a 1.9 % incline. Each locomotive weighs 76  ton and each freight car weighs 44  ton. Use positive as the direction the train is going. What is the mass of the entire train? (In US customary units)

To determine the total mass of the entire train, we need to calculate the mass of both the locomotives and the freight cars, then sum them.

### Given:
- Each locomotive weighs 76 tons.
- There are 5 locomotives.
- Each freight car weighs 44 tons.
- There are 60 freight cars.

### Step 1: Calculate the mass of the locomotives
\[
\text{Total mass of locomotives} = 5 \times 76 \, \text{tons} = 380 \, \text{tons}
\]

### Step 2: Calculate the mass of the freight cars
\[
\text{Total mass of freight cars} = 60 \times 44 \, \text{tons} = 2640 \, \text{tons}
\]

### Step 3: Calculate the total mass of the train
\[
\text{Total mass of the train} = 380 \, \text{tons} + 2640 \, \text{tons} = 3020 \, \text{tons}
\]

So, the mass of the entire train is **3020 tons**.

Would you like further details or have any questions?

### Related questions:
1. How would the mass change if there were 7 locomotives instead?
2. What is the total mass of 100 freight cars if each weighs 48 tons?
3. How does the incline angle affect the force required to stop the train?
4. What is the difference in mass if each locomotive weighed 80 tons instead?
5. If the incline increased to 2.5%, how would that affect the dynamics of the train?

### Tip:
When calculating the total mass of a system, always check if there are distinct components (like locomotives and freight cars) and handle them separately before adding.

The EF Express, a train with 5 locomotives and 60 freight cars, is going down a 1.9% incline. Each locomotive weighs 76 tons and each freight car weighs 44 tons. What is the mass of the entire train? (In US customary units)

Learn how to calculate the total mass of the EF Express train with 5 locomotives weighing 76 tons each and 60 freight cars weighing 44 tons each. This problem covers basic arithmetic concepts such as multiplication and addition, suitable for Grades 6-8.

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