A train has a constant speed of 40 `ms^(-1)` on a level road against resistive force of magnitude `3xx10^(4) N`. Find the power of the engine.

Explanation

To solve the problem, we need to find the power of the engine of the train moving at a constant speed against a resistive force. Here’s a step-by-step solution:

### Step 1: Identify the given values
- Speed of the train (v) = 40 m/s
- Resistive force (R) = 3 × 10^4 N

### Step 2: Understand the concept of power
Power (P) is defined as the rate at which work is done or energy is transferred. It can also be calculated using the formula:
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