Achild's top is held in place upright on a frictionless surface. the axle has a radius of =3.21 mm . two strings are wrapped around the axle, and the top is set spinning by applying t=3.15 n of constant tension to each string. if it takes 0.320 s for the string to unwind, how much angular momentum does the top acquire? assume that the strings do not slip as the tension is applied.

Angular momentum,

Explanation:

It is given that,

Radius of the axle,

Tension acting on the top, T = 3.15 N

Time taken by the string to unwind, t = 0.32 s

We know that the rate of change of angular momentum is equal to the torque acting on the torque. The relation is given by :

Torque acting on the top is given by :

Here, F is the tension acting on it. Torque acting on the top is given by :

So, the angular momentum acquired by the top is . Hence, this is the required solution.

car a and b are moving in opposite directions

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