A pulley is attached to the ceiling of a lift moving upwards. Two part

1.	A pulley is attached to the ceiling of a lift moving upwards. Two particles are attached to the twoends of a massless string passing over the smooth pulley. The masses of the particles are in the ratio2 : 1. If the acceleration of the particles is g/2 w.r.t. lift, then the acceleration of the lift will be
Answer» Givenacceleration of the particles is g/2=a' now letacceleration of the lift = a upwards assume lift at rest and apply psudo force = mass* a to both masses ER. RAVI KUMAR ROY Let masses as 2m and m 2m>m so 2m will move downward with a' So 2mg+2ma-T=2ma'=2m(g/2)=mg .....(1) and similarly for m mass T-mg-ma=ma'=m(g/2) .....(2) Solving both we get a=(g/2)

A pulley is attached to the ceiling of a lift moving upwards. Two particles are attached to the twoends of a massless string passing over the smooth pulley. The masses of the particles are in the ratio2 : 1. If the acceleration of the particles is g/2 w.r.t. lift, then the acceleration of the lift will be

Answer»

Givenacceleration of the particles is g/2=a'

now letacceleration of the lift = a upwards

assume lift at rest and apply psudo force = mass* a to both masses

ER. RAVI KUMAR ROY

Let masses as 2m and m

2m>m so 2m will move downward with a'

So 2mg+2ma-T=2ma'=2m(g/2)=mg .....(1)

and similarly for m mass

T-mg-ma=ma'=m(g/2) .....(2)

Solving both we get

a=(g/2)

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