Question

(c) angular momentum (d) velocity Ans. (c 4. The twisting couple required in the case of hollow cylinder as compared to the said cylinder of the same material mass and length will be : (a) equal in both cases (b) non-equal in both cases. (c) lesser for hollow than solid-cylinder (d) greater for the hollow cylinder than solid cylinder. Ans.(c 25. The volume of the liquid passing per sec through a norrow tube is :​

Answer 1

Answer:

Their kinetic energies at the bottom will be

2

1

mv

2

+

2

1

Iω

2

=

2

1

mv

2

+

2

1

kmr

2

r

2

v

2

=

2

1

mv

2

(1+k) The velocity would be greater for the material with radius of gyration k is lower of for which the moment of inertia is lower. Solid cylinder with k as 1/2 will have greater velocity as compared to hollow cylinder which has k as 1. As as they have same mass and radius their energies at both the levels would remains same including the potential energy and energy lost due to friction. Thus both option B and D

Answer 2

Answer:

the ka is aur hai is karane to is liye ki prasth agar