Answer:
A
Explanation:
The weight is acting downwards where as the buoyant force acting upwards (opposite) direction with equal amount of force. so the opposite forces cancel out each other (because of the force amount being equal) and no net force is acting on the object.
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Answer:
Rotational inertia of the object is given as

Explanation:
As we know that the acceleration of the object on inclined plane is given as

now we know that velocity at any instant of time is given as

now we know that if the graph between velocity and time is given then the slope of the graph will be same as acceleration
so here we have

now from the graph slope of the graph is given as




now rotational inertia is given as



Resistance = (voltage) / (current)
Resistance = (6.0 v) / (2.0 A)
Resistance = 3.0 ohms
Inertia
the awnswer is inertia b