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need confirmation in arihant mec vol 2(d c pandey) ,rotational dynamics , example 9.19 ,in explanation part 9.10 )torque eqs applied(i.e f cross R ) are incorrect right eg 9.19 the question is two masses m1,m2 are connected by massless sting over a solid cylinder(no thread slipping and no axle friction is absent) if m1(left side block ) and t1 is tension in left side part of string,m2(rigt block) t2 is tension in right part of string the eqs given in book are t1-m1g=m1a m2g-t2=m2a (t2-t1)r=.5mr^2(a/r)(torque eq given in text) r is radius of cylinder and m is mass of cylinder



















need confirmation


in arihant mec vol 2(d c pandey) ,rotational dynamics ,example 9.19,in explanation part 9.10)torque eqs applied(i.e f cross R) are incorrect right


eg 9.19 


the question is 


two masses m1,m2 are connected by massless sting over a solid cylinder(no thread slipping and no axle friction is absent) if m1(left side block ) and t1 is tension in left side part of string,m2(rigt block) t2 is tension in right part of string


the eqs given in book are 


t1-m1g=m1a


m2g-t2=m2a


(t2-t1)r=.5mr^2(a/r)(torque eq given in text) r is radius of cylinder and m is mass of cylinder










   




Grade:Upto college level

2 Answers

Badiuddin askIITians.ismu Expert
148 Points
14 years ago

Dear akash kashyp

Torge should be r X F .

all the given equation are correct.

in which equation  you have doubt  ,clearly post it here.

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Badiuddin


akash kashyp
8 Points
14 years ago
in the torque equation torque due to t1 is clockwise and outwards the plane and torque due to t2 is anticlockwise is it not

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