Well the object will have no Momentum since it is not moving, so a small object that is going 10 mph will have Momentum.
That is called the capacity.
Answer:
It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.
Explanation:
P=IV
V=IR
P=I(IR)
P=I²R
375=5²R
R=375/25
R=15
To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. Mathematically it can be described as,

Here,
= Frequency of Source
= Speed of sound
f = Frequency heard before slowing down
f' = Frequency heard after slowing down
v = Speed of the train before slowing down
So if the speed of the train after slowing down will be v/2, we can do a system equation of 2x2 at the two moments, then,
The first equation is,



Now the second expression will be,



Dividing the two expression we have,

Solving for v, we have,

Therefore the speed of the train before and after slowing down is 22.12m/s