A CD rotates with an angular momentum of 20 Kg. m^2/s and moment of inertia 4 Kg. m^2. The angular velocity of this CD is equal to 24 rad/sec

5 rad/sec

80 rad/sec

16 rad/sec

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grav forces affect all objects magnetic forces affect magnetic objects and electric currents

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards