A1500 kg weather rocket accelerates upward at 10m/s2. it explodes 2.0 s after liftoff and breaks into two fragments, one twice as massive as the other. photos reveal that the lighter fragment traveled straight up and reached a maximum height of 530 m. part a what was the speed of the heavier fragment just after the explosion? express your answer with the appropriate units.

Explanation:

By kinematics:

The rocket's height at this point is:

On the lighter fragment:

 where Vf=0. Solving for VL:

By conservation of the momentum:

Solving for :

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)