(Answer the following questions briefly and to the point :)
A constant retarding force of 100 N is applied to a body of mass 10 kg moving initially with a speed of 30 `ms^(-1)`. What is the retardation of the body ?

Explanation

To find the retardation of the body, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (or retardation in this case).

### Step-by-Step Solution:

1. **Identify the given values:**
- Retarding force (F) = -100 N (negative because it is a retarding force)
- Mass of the body (m) = 10 kg

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