A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of `15 ms^(-1).` How long does the body take to stop ?

Explanation

To solve the problem step by step, we will use the concepts of force, mass, acceleration, and kinematics.

### Step 1: Identify the given values
- Retarding force (F) = -50 N (negative because it is a retarding force)
- Mass of the body (m) = 20 kg
- Initial speed (U) = 15 m/s
- Final speed (V) = 0 m/s (since the body comes to a stop)

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