Author Question: Two masses m1 and m2, with m1 < m2, have equal kinetic energy. How do the magnitudes of their ... (Read 50 times)

tiffannnnyyyyyy · **on:** Jul 28, 2018

Two masses m1 and m2, with m1 < m2, have equal kinetic energy. How do the magnitudes of their momenta compare?
1.not enough information
2. p1 < p2
3. p1 = p2
4. p1 > p2

Question 2

A book of mass m is projected with a speed v across a horizontal surface. The book slides until it stops due to the friction force between the book and the surface. The surface is now tilted 30, and the book is projected up the surface with the same initial speed v. When the book has come to rest, how does the decrease in mechanical energy of the book-Earth system compare to that when the book slid over the horizontal surface?
1.It's the same.
2.Its larger on the tilted surface.
3.Its smaller on the tilted surface.
4.More information is needed.