Paragraph for 19 to 20 Three planks 1 2 and 3 are arranged

Last updated: 6/9/2023

Paragraph for 19 to 20 Three planks 1 2 and 3 are arranged on a pulley system in a vertical plane as shown in figure Plank 1 has a mass of m plank 2 and plank 3 are massless All the pulleys are mass less and frictionless An external vertical force mg is applied over plank 1 Assume planks are very close to each other and they don t rotate wwwwwwwww 3 A mg T mg m If the whole assembly is taken in an elevator which is moving upwards with an acceleration g the reaction between plank 2 and 3 will be B 2 mg ww www we C mg The reaction between 2 and 3 if the elevator falls freely A mg B mg 3 C mg 2 D zero D zero