4.10 A body of mass 0.40 kg moving initially with a constant speed of 10ms−1 to the north is subject 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, the position of the body at that time to be x=0, and predict its position at t=−5s,25s,100s.
a. Predict its position at t=-5 s.
b. Predict its position at 25 s.
c. Predict its position at 100 s.