Because regular wheels may get shot at and the tracks make it easier for the tank to go over rough/bumpy land.
Answer:
The answer is 4th choice. Down with a speed less than v.
Explanation:
The momentum of the person and the balloon need to cancel each other out. Momentum formula of the balloon is as following:
At the moment of t=0, the person and the balloon has the 0 speed.
When the person starts to climb on a balloon, balloon need to cancel this momentum out. We know that the balloon is more heavier than the person. So balloon need to go down with the speed of less than v.
There are 35 black holes known in the Andromeda galaxy!
Answer:
D
Explanation:
Because of the Suns magntism the solar system has been created