Question

Consider a small disk that can slide on a horizontal plane (covered by xy coordinates) without friction. You launch the disk from the origin of your coordinate system, it eventually hits a wall, bounces off perfectly elastically and crosses the y-axis again at y=1 m. If the shape of the wall is given by y=x−2, then at what angle with respect to the x-axis in radians did you launch the disk?

Answer 1

cool

Answer 2

uh, actually i wanna know the ans. real fast....

Answer 3

so

Answer 4

i dont care

Answer 5

k

Answer 6

i dont know the anser sorry dude

Answer 7

ask someone else

Answer 8

hello

Answer 9

then wat ?