[Mod note: Thread moved from New Member Introductions, so no template] I have a qns whereby a ramp of mass M rests on a frictionless floor and a mass m rests on the ramp, with no friction in between the mass and ramp. I need to find the acceleration of ramp M and mass m. I have the answers but I dont really understand them. aM= 2mgsinxcosx/M+m(sinx)^2 . I dont understand why is there a msin^2 term here am=[(M+m)gsinx]/M+(msinx)^2 . Again I dont understand why is there a msin^2 and how does M factor into the acceleration. Can someone pls teach mr how to get the ans?