If something is going down a hill it can help slow it down
it can stop you from flying off a rollercoaster
Answer:
oo.p i wish I could answer that
Explanation:
Longitudinal, because the sound can only travel at one direction
Answer:

Explanation:
Given that
At X=0 V=Vo
At X=X1 V=0
As we know that friction force is always try to oppose the motion of an object. It means that it provide acceleration in the negative direction.
We know that



So the friction force on the box
Ff= m x a

Where m is the mass of the box.