A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 m/s. After 5 seconds it explodes into two fragments….

Q: A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 m/s. After 5 seconds it explodes into two fragments. One fragment of mass 400 g is found to go down with a speed of 25 m/s. What will happen to the second fragment just after the explosion? (g = 10 m/s2)

(a) It will go upward with speed 40 m/s

(b) It will go upward with speed 100 m/s

(c) It will go upward with speed 60 m/s

(d) It will also go downward with speed 40 m/s

Ans: (b)