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is the FBD right
A wedge of inclination theta is fixed with a frictionless pulley on its top.A light inextensible rope goes over the pulley.One of its ends is attached to a fixed wall.The other end is attatched to a small block of mass m kept on the wedge.If the mass of the wedge be M,the friction coefficient between wedge and block be x and surface on which the wedge is kept be frictionless; find the acceleration of the wedge if the block is sliding down the wedge with an uniform velocity?
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4 Answers
1357Draw the FBD of mass m (take pseudo force into consideration if you want)
1In your F.B.D, the wedge is moving with acceleration a along with the mass m.So the the pseudo force ma is correct.But the mass is also moving downwards along the wedge with a certain acceleration.
1A request- please don't draw pseudo forces in F.B.D. They tend to confuse you if your focus is not all that good.