Answer:
39.2m/s
Explanation:
The potential energy the book has right before it falls is equal to the kinetic energy in falling.
PE = KE
mgh = (1/2)mv
2gh=v
v=(2)(9.81)(2)
v=39.24m/s
I'll say that's mechanical weathering
It is an example of reflection of wave. C.
By studying meteorites which are the most ancient material in space.
