An object of mass 10 kg is moving with an initial velocity of `10 m s^(-1)`. A constant force acts for 4 s on the object giving it a speed of 2 m `s^(-1)` in the opposite direction. Find the acceleration and force.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Identify the given values
- Mass of the object (m) = 10 kg
- Initial velocity (u) = 10 m/s (in the positive direction)
- Final velocity (v) = -2 m/s (in the opposite direction, hence negative)
- Time (t) = 4 s

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