Problems on mechanics

Two students analysed two different problems off mechanics involving constraint motion. Symbols have their usual meaning. The vertical rod can move only vertically and the wedge can move only horizontally. y/x=tantheta, y=x tan theta, v_(y)=v_(x)tantheta Student B . The ends of the rods are slipping on the ground and the wall, respectively y/x=tantheta, y=xtantheta, vy=vxtantheta

Mechanism

Mechanism

Mechanism

2 Infinite Pulley System Problem || Pulley Problem Mechanics || JEE Mains & Advanced Special

Explain briefly what is mechanics and mention the different branches of mechanics.