A body of mass 0.40 kg moving initially with a constant speed of `10 m//s` to the north is subjected to a constant force of 8.0 N directed towards the south for 30 s Take the instant the force is applied to be t = 0, and the position of the particle at that time to be x = 0, predict its position at `t = -5 s , 25 s, 100 s` ?

Explanation

To solve the problem step by step, we will analyze the motion of the body under the influence of the applied force and calculate its position at the specified times.

### Given Data:
- Mass of the body, \( m = 0.40 \, \text{kg} \)
- Initial speed, \( u = 10 \, \text{m/s} \) (to the north)
- Force applied, \( F = 8.0 \, \text{N} \) (to the south)
- Time duration of force application, \( t = 30 \, \text{s} \)
- Initial position, \( x(0) = 0 \)
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