Question

If a thin disk and a hoop moving on a surface, having same mass and radius ,same angular
Acceleration, ratio of torque of disk to hoop is___
a) 1
b) 2
c) 4
d) 5

Answer 1

@Rohitkhanna I know I = mr^2 for hoop and for Dsic is 1/2mr^2

Answer 2

torque= I x angular acceleration

Answer 3

yup , but when we take ratio it comes 1:2

Answer 4

grrrrrrr by mistake close it D:

Answer 5

yes.both have same I.

Answer 6

how they have same I ???

Answer 7

@sarah786 yup ratio will be 1:2

Answer 8

ok its mean options are incorrect . Thank you @sre and @Rohitkhanna

Answer 9

sorry.my mistake this time.the values of I u gave r correct

Answer 10

its ok ^_^ @Rohitkhanna