A block of 5 kg is resting on a frictionless plane. It is struck by a jet releasing water at the rate of 3 kg/s at a speed of 4 `m s^(-1)`. Calculate the initial acceleration of the block.

Explanation

To solve the problem, we need to calculate the initial acceleration of a block that is resting on a frictionless plane and is struck by a jet of water. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the given data
- Mass of the block, \( m = 5 \, \text{kg} \)
- Rate of water flow, \( \frac{dm}{dt} = 3 \, \text{kg/s} \)
- Speed of the water jet, \( v = 4 \, \text{m/s} \)

### Step 2: Calculate the force exerted by the water jet
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